QUDT Quantity Kinds Version 3.1.0
This version:
Latest published version: http://www.qudt.org/doc/2025/03/DOC_VOCAB-QUANTITY-KINDS-ALL.html
Previous published version: https://qudt.org/doc/2025/02/DOC_VOCAB-QUANTITY-KINDS-ALL.html
Editor: Ralph Hodgson, TopQuadrant, Inc
Contributors: Jack Hodges, Simon J D Cox, Steve Ray
Last Modified: 2024-10-26T14:11:16.049-04:00
Copyright © 2011 - 2025 qudt.org , All Rights Reserved.
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Abstract
Provides the set of all quantity kinds.
The namespace prefix for resources in this ontology is: quantitykind
The vocabulary graph is available as:
Turtle
Table of Contents
Imported Graphs
A list of graphs imported by http://qudt.org/3.1.0/vocab/quantitykind is shown below.
| Graph URI | Intent |
|---|---|
| http://qudt.org/3.1.0/schema/facade/qudt | |
| http://qudt.org/3.1.0/vocab/dimensionvector | TBD |
Non-imported Resources
The graph uses 19 resources from other graphs that are not imported, as listed below:
Resource Index
The main namespace for resources in this graph is http://qudt.org/vocab/quantitykind/ with the prefix quantitykind.
Classes
No Classes defined in this graph
Properties
No Properties defined in this graph
Instances
The graph defines, or extends, 1163 instances, as indexed below:
Restricted Datatypes
No restricted datatypes defined in this graph
quantitykind:AbsoluteActivity
URI: http://qudt.org/vocab/quantitykind/AbsoluteActivity
The "Absolute Activity" is the exponential of the ratio of the chemical potential to $RT$ where $R$ is the gas constant and $T$ the thermodynamic temperature.
Applicable units are those of quantitykind:AbsoluteActivity
quantitykind:AbsoluteHumidity
URI: http://qudt.org/vocab/quantitykind/AbsoluteHumidity
$\textit{Absolute Humidity}$ is an amount of water vapor, usually discussed per unit volume. Absolute humidity in air ranges from zero to roughly 30 grams per cubic meter when the air is saturated at $30 ^\circ C$. The absolute humidity changes as air temperature or pressure changes. $$$$ This is very inconvenient for chemical engineering calculations, e.g. for clothes dryers, where temperature can vary considerably. As a result, absolute humidity is generally defined in chemical engineering as mass of water vapor per unit mass of dry air, also known as the mass mixing ratio, which is much more rigorous for heat and mass balance calculations. $$$$ Mass of water per unit volume as in the equation above would then be defined as volumetric humidity, because of the potential confusion.
Applicable units are those of quantitykind:Density
quantitykind:AbsoluteTypographicMeasurement
URI: http://qudt.org/vocab/quantitykind/AbsoluteTypographicMeasurement
Applicable units are those of quantitykind:Length
quantitykind:AbsorbedDose
URI: http://qudt.org/vocab/quantitykind/AbsorbedDose
"Absorbed Dose" (also known as Total Ionizing Dose, TID) is a measure of the energy deposited in a medium by ionizing radiation. It is equal to the energy deposited per unit mass of medium, and so has the unit $J/kg$, which is given the special name Gray ($Gy$).
Applicable units are those of quantitykind:AbsorbedDose
quantitykind:AbsorbedDoseRate
URI: http://qudt.org/vocab/quantitykind/AbsorbedDoseRate
"Absorbed Dose Rate" is the absorbed dose of ionizing radiation imparted at a given location per unit of time (second, minute, hour, or day).
Applicable units are those of quantitykind:AbsorbedDoseRate
quantitykind:Absorptance
URI: http://qudt.org/vocab/quantitykind/Absorptance
Absorptance is the ratio of the radiation absorbed by a surface to that incident upon it. Also known as absorbance.
Applicable units are those of quantitykind:Absorptance
quantitykind:Acceleration
URI: http://qudt.org/vocab/quantitykind/Acceleration
$\textit{Acceleration}$ is the (instantaneous) rate of change of velocity. Acceleration may be either linear acceleration, or angular acceleration. It is a vector quantity with dimension $length/time^{2}$ for linear acceleration, or in the case of angular acceleration, with dimension $angle/time^{2}$. $$$$ In SI units, linear acceleration is measured in $meters/second^{2}$ ($m \cdot s^{-2}$), and angular acceleration is measured in $radians/second^{2}$. $$$$ In physics, any increase or decrease in speed is referred to as acceleration and similarly, motion in a circle at constant speed is also an acceleration, since the direction component of the velocity is changing.
Applicable units are those of quantitykind:Acceleration
quantitykind:AccelerationOfGravity
URI: http://qudt.org/vocab/quantitykind/AccelerationOfGravity
The acceleration of freely falling bodies under the influence of terrestrial gravity, equal to approximately 9.81 meters (32 feet) per second per second.
Applicable units are those of quantitykind:Acceleration
quantitykind:AcceptorDensity
URI: http://qudt.org/vocab/quantitykind/AcceptorDensity
"Acceptor Density" is the number per volume of acceptor levels.
Applicable units are those of quantitykind:NumberDensity
quantitykind:AcceptorIonizationEnergy
URI: http://qudt.org/vocab/quantitykind/AcceptorIonizationEnergy
"Acceptor Ionization Energy" is the ionization energy of an acceptor.
Applicable units are those of quantitykind:Energy
quantitykind:Acidity
URI: http://qudt.org/vocab/quantitykind/Acidity
Chemicals or substances having a pH less than 7 are said to be acidic; lower pH means higher acidity.
Applicable units are those of quantitykind:Acidity
quantitykind:AcousticImpedance
URI: http://qudt.org/vocab/quantitykind/AcousticImpedance
$\textit{Acoustic Impedance}$ at a surface is the complex quotient of the average sound pressure over that surface by the sound volume flow rate through that surface.
Applicable units are those of quantitykind:AcousticImpedance
quantitykind:Action
URI: http://qudt.org/vocab/quantitykind/Action
An action is usually an integral over time. But for action pertaining to fields, it may be integrated over spatial variables as well. In some cases, the action is integrated along the path followed by the physical system. $$$$ The evolution of a physical system between two states is determined by requiring the action be minimized or, more generally, be stationary for small perturbations about the true evolution. This requirement leads to differential equations that describe the true evolution. Conversely, an action principle is a method for reformulating differential equations of motion for a physical system as an equivalent integral equation. Although several variants have been defined (see below), the most commonly used action principle is Hamilton's principle.
Applicable units are those of quantitykind:Action
quantitykind:ActionTime
URI: http://qudt.org/vocab/quantitykind/ActionTime
Action Time (sec)
quantitykind:ActiveEnergy
URI: http://qudt.org/vocab/quantitykind/ActiveEnergy
$\textit{Active Energy}$ is the electrical energy transformable into some other form of energy.
Applicable units are those of quantitykind:Energy
quantitykind:ActivePower
URI: http://qudt.org/vocab/quantitykind/ActivePower
An $Active Power$ is, under periodic conditions, the mean value, taken over one period $T$, of the instantaneous power $p$. In complex notation, $P = \mathbf{Re} \; \underline{S}$, where $\underline{S}$ is $\textit{complex power}$.
Applicable units are those of quantitykind:ActivePower
quantitykind:Activity
URI: http://qudt.org/vocab/quantitykind/Activity
$\textit{Activity}$ is the number of decays per unit time of a radioactive sample, the term used to characterise the number of nuclei which disintegrate in a radioactive substance per unit time. Activity is usually measured in Becquerels ($Bq$), where 1 $Bq$ is 1 disintegration per second, in honor of the scientist Henri Becquerel.
Applicable units are those of quantitykind:Activity
quantitykind:ActivityCoefficient
URI: http://qudt.org/vocab/quantitykind/ActivityCoefficient
An "Activity Coefficient" is a factor used in thermodynamics to account for deviations from ideal behaviour in a mixture of chemical substances. In an ideal mixture, the interactions between each pair of chemical species are the same (or more formally, the enthalpy change of solution is zero) and, as a result, properties of the mixtures can be expressed directly in terms of simple concentrations or partial pressures of the substances present e.g. Raoult's law. Deviations from ideality are accommodated by modifying the concentration by an activity coefficient.
Applicable units are those of quantitykind:ActivityCoefficient
quantitykind:ActivityConcentration
URI: http://qudt.org/vocab/quantitykind/ActivityConcentration
The "Activity Concentration", also known as volume activity, and activity density, is .
Applicable units are those of quantitykind:ActivityConcentration
quantitykind:ActivityRelatedByMass
URI: http://qudt.org/vocab/quantitykind/ActivityRelatedByMass
$\textit{Activity Related By Mass}$ is quantitative data of the radioactivity of the amount of a radionuclide in a particular state of energy at a defined point in time, divided by the related mass of this quantity.
Applicable units are those of quantitykind:MassicActivity
quantitykind:ActivityThresholds
URI: http://qudt.org/vocab/quantitykind/ActivityThresholds
"Activity Thresholds" are thresholds of sensitivity for radioactivity.
quantitykind:Adaptation
URI: http://qudt.org/vocab/quantitykind/Adaptation
"Adaptation" is the recovery of visual ability following exposure to light (dark adaptation), usually measured in units of time.
Applicable units are those of quantitykind:Time
quantitykind:Admittance
URI: http://qudt.org/vocab/quantitykind/Admittance
"Admittance" is a measure of how easily a circuit or device will allow a current to flow. It is defined as the inverse of the impedance ($Z$).
Applicable units are those of quantitykind:Admittance
quantitykind:AlphaDisintegrationEnergy
URI: http://qudt.org/vocab/quantitykind/AlphaDisintegrationEnergy
The "Alpha Disintegration Energy" is the sum of the kinetic energy of the $\alpha$-particle produced in the disintegration process and the recoil energy of the product atom in the reference frame in which the emitting nucleus is at rest before its disintegration.
Applicable units are those of quantitykind:Energy
quantitykind:Altitude
URI: http://qudt.org/vocab/quantitykind/Altitude
Altitude or height is defined based on the context in which it is used (aviation, geometry, geographical survey, sport, and more). As a general definition, altitude is a distance measurement, usually in the vertical or "up" direction, between a reference datum and a point or object. The reference datum also often varies according to the context. [Wikipedia]
Applicable units are those of quantitykind:Length
quantitykind:AmbientPressure
URI: http://qudt.org/vocab/quantitykind/AmbientPressure
The ambient pressure on an object is the pressure of the surrounding medium, such as a gas or liquid, which comes into contact with the object. The SI unit of pressure is the pascal (Pa), which is a very small unit relative to atmospheric pressure on Earth, so kilopascals ($kPa$) are more commonly used in this context.
Applicable units are those of quantitykind:ForcePerArea
quantitykind:AmountOfBiologicallyActiveSubstance
URI: http://qudt.org/vocab/quantitykind/AmountOfBiologicallyActiveSubstance
quantitykind:AmountOfCloudCover
URI: http://qudt.org/vocab/quantitykind/AmountOfCloudCover
Applicable units are those of quantitykind:AmountOfCloudCover
quantitykind:AmountOfSubstance
URI: http://qudt.org/vocab/quantitykind/AmountOfSubstance
$\textit{Amount of Substance}$ is a standards-defined quantity that measures the size of an ensemble of elementary entities, such as atoms, molecules, electrons, and other particles. It is sometimes referred to as chemical amount. The International System of Units (SI) defines the amount of substance to be proportional to the number of elementary entities present. The SI unit for amount of substance is mole. It has the unit symbol $mol$. The mole is defined as the amount of substance that contains an equal number of elementary entities as there are atoms in 0.012kg of the isotope carbon-12. This number is called Avogadro's number and has the value $6.02214179(30) \times 10^{23}$. The only other unit of amount of substance in current use is the $pound-mole$ with the symbol $lb-mol$, which is sometimes used in chemical engineering in the United States. One $pound-mole$ is exactly $453.59237 mol$.
Applicable units are those of quantitykind:AmountOfSubstance
quantitykind:AmountOfSubstanceConcentration
URI: http://qudt.org/vocab/quantitykind/AmountOfSubstanceConcentration
"Amount of Substance of Concentration" is defined as the amount of a constituent divided by the volume of the mixture.
Applicable units are those of quantitykind:Concentration
quantitykind:AmountOfSubstanceFraction
URI: http://qudt.org/vocab/quantitykind/AmountOfSubstanceFraction
"Fractional Amount of Substance" is defined as tthe amount of a constituent divided by the total amount of all constituents in a mixture.
Applicable units are those of quantitykind:AmountOfSubstanceFraction
quantitykind:AmountOfSubstanceIonConcentration
URI: http://qudt.org/vocab/quantitykind/AmountOfSubstanceIonConcentration
"Ion Concentration" is the moles of ions per volume of solution.
Applicable units are those of quantitykind:Concentration
quantitykind:AmountOfSubstancePerMass
URI: http://qudt.org/vocab/quantitykind/AmountOfSubstancePerMass
Applicable units are those of quantitykind:AmountOfSubstancePerMass
quantitykind:AmountOfSubstancePerMassPressure
URI: http://qudt.org/vocab/quantitykind/AmountOfSubstancePerMassPressure
The "Variation of Molar Mass" of a gas as a function of pressure.
Applicable units are those of quantitykind:AmountOfSubstancePerMassPressure
quantitykind:AmountOfSubstancePerVolume
URI: http://qudt.org/vocab/quantitykind/AmountOfSubstancePerVolume
The amount of substance per volume is called the molar density. Molar density is an intensive property of a substance and depends on the temperature and pressure.
Applicable units are those of quantitykind:Concentration
quantitykind:Angle
URI: http://qudt.org/vocab/quantitykind/Angle
The abstract notion of angle. Narrow concepts include plane angle and solid angle. While both plane angle and solid angle are dimensionless, they are actually length/length and area/area respectively.
Applicable units are those of quantitykind:Angle
quantitykind:AngleOfAttack
URI: http://qudt.org/vocab/quantitykind/AngleOfAttack
Angle of attack is the angle between the oncoming air or relative wind and a reference line on the airplane or wing.
Applicable units are those of quantitykind:Angle
quantitykind:AngleOfOpticalRotation
URI: http://qudt.org/vocab/quantitykind/AngleOfOpticalRotation
The "Angle of Optical Rotation" is the angle through which plane-polarized light is rotated clockwise, as seen when facing the light source, in passing through an optically active medium.
Applicable units are those of quantitykind:Angle
quantitykind:AngularAcceleration
URI: http://qudt.org/vocab/quantitykind/AngularAcceleration
Angular acceleration is the rate of change of angular velocity over time. Measurement of the change made in the rate of change of an angle that a spinning object undergoes per unit time. It is a vector quantity. Also called Rotational acceleration. In SI units, it is measured in radians per second squared ($rad/s^2$), and is usually denoted by the Greek letter alpha.
Applicable units are those of quantitykind:AngularAcceleration
quantitykind:AngularCrossSection
URI: http://qudt.org/vocab/quantitykind/AngularCrossSection
"Angular Cross-section" is the cross-section for ejecting or scattering a particle into an elementary cone, divided by the solid angle $d\Omega$ of that cone.
Applicable units are those of quantitykind:AngularCrossSection
quantitykind:AngularDistance
URI: http://qudt.org/vocab/quantitykind/AngularDistance
Angular distance travelled by orbiting vehicle measured from the azimuth of closest approach.
Applicable units are those of quantitykind:Angle
quantitykind:AngularFrequency
URI: http://qudt.org/vocab/quantitykind/AngularFrequency
"Angular frequency", symbol $\omega$ (also referred to by the terms angular speed, radial frequency, circular frequency, orbital frequency, radian frequency, and pulsatance) is a scalar measure of rotation rate. Angular frequency (or angular speed) is the magnitude of the vector quantity angular velocity.
Applicable units are those of quantitykind:AngularFrequency
quantitykind:AngularImpulse
URI: http://qudt.org/vocab/quantitykind/AngularImpulse
The Angular Impulse, also known as angular momentum, is the moment of linear momentum around a point. It is defined as$H = \int Mdt$, where $M$ is the moment of force and $t$ is time.
Applicable units are those of quantitykind:AngularImpulse
quantitykind:AngularMomentum
URI: http://qudt.org/vocab/quantitykind/AngularMomentum
$\textit{Angular Momentum}$, $\textit{Moment of Momentum}$, or $\textit{Rotational Momentum}$, is a vector quantity that represents the product of a body's rotational inertia and rotational velocity about a particular axis. The $\textit{Angular Momentum}$ of an object rotating about some reference point is the measure of the extent to which the object will continue to rotate about that point unless acted upon by an external torque. In particular, if a point mass rotates about an axis, then the angular momentum with respect to a point on the axis is related to the mass of the object, the velocity and the distance of the mass to the axis. While the motion associated with linear momentum has no absolute frame of reference, the rotation associated with angular momentum is sometimes spoken of as being measured relative to the fixed stars.
Applicable units are those of quantitykind:AngularMomentum
quantitykind:AngularMomentumPerAngle
URI: http://qudt.org/vocab/quantitykind/AngularMomentumPerAngle
Applicable units are those of quantitykind:AngularMomentumPerAngle
quantitykind:AngularReciprocalLatticeVector
URI: http://qudt.org/vocab/quantitykind/AngularReciprocalLatticeVector
"Angular Reciprocal Lattice Vector" is a vector whose scalar products with all fundamental lattice vectors are integral multiples of $2\pi$.
Applicable units are those of quantitykind:AngularReciprocalLatticeVector
quantitykind:AngularVelocity
URI: http://qudt.org/vocab/quantitykind/AngularVelocity
Angular Velocity refers to how fast an object rotates or revolves relative to another point.
Applicable units are those of quantitykind:AngularVelocity
quantitykind:AngularWavenumber
URI: http://qudt.org/vocab/quantitykind/AngularWavenumber
"wavenumber" is the spatial frequency of a wave - the number of waves that exist over a specified distance. More formally, it is the reciprocal of the wavelength. It is also the magnitude of the wave vector.
Applicable units are those of quantitykind:AngularWavenumber
quantitykind:ApogeeRadius
URI: http://qudt.org/vocab/quantitykind/ApogeeRadius
Apogee radius of an elliptical orbit
Applicable units are those of quantitykind:Length
quantitykind:ApparentPower
URI: http://qudt.org/vocab/quantitykind/ApparentPower
"Apparent Power" is the product of the rms voltage $U$ between the terminals of a two-terminal element or two-terminal circuit and the rms electric current I in the element or circuit. Under sinusoidal conditions, the apparent power is the modulus of the complex power.
Applicable units are those of quantitykind:ComplexPower
quantitykind:Area
URI: http://qudt.org/vocab/quantitykind/Area
Area is a quantity expressing the two-dimensional size of a defined part of a surface, typically a region bounded by a closed curve.
Applicable units are those of quantitykind:Area
quantitykind:AreaAngle
URI: http://qudt.org/vocab/quantitykind/AreaAngle
Applicable units are those of quantitykind:AreaAngle
quantitykind:AreaBitDensity
URI: http://qudt.org/vocab/quantitykind/AreaBitDensity
Applicable units are those of quantitykind:AreaBitDensity
quantitykind:AreaChargeDensity
URI: http://qudt.org/vocab/quantitykind/AreaChargeDensity
Applicable units are those of quantitykind:ElectricChargePerArea
quantitykind:AreaMass
URI: http://qudt.org/vocab/quantitykind/AreaMass
Applicable units are those of quantitykind:MassPerArea
quantitykind:AreaPerLength
URI: http://qudt.org/vocab/quantitykind/AreaPerLength
Applicable units are those of quantitykind:AreaPerLength
quantitykind:AreaPerPower
URI: http://qudt.org/vocab/quantitykind/AreaPerPower
Applicable units are those of quantitykind:AreaPerPower
quantitykind:AreaPerTime
URI: http://qudt.org/vocab/quantitykind/AreaPerTime
Applicable units are those of quantitykind:AreaPerTime
quantitykind:AreaRatio
URI: http://qudt.org/vocab/quantitykind/AreaRatio
Applicable units are those of quantitykind:AreaRatio
quantitykind:AreaTemperature
URI: http://qudt.org/vocab/quantitykind/AreaTemperature
Applicable units are those of quantitykind:AreaTemperature
quantitykind:AreaThermalExpansion
URI: http://qudt.org/vocab/quantitykind/AreaThermalExpansion
When the temperature of a substance changes, the energy that is stored in the intermolecular bonds between atoms changes. When the stored energy increases, so does the length of the molecular bonds. As a result, solids typically expand in response to heating and contract on cooling; this dimensional response to temperature change is expressed by its coefficient of thermal expansion.
Applicable units are those of quantitykind:AreaThermalExpansion
quantitykind:AreaTime
URI: http://qudt.org/vocab/quantitykind/AreaTime
Applicable units are those of quantitykind:AreaTime
quantitykind:AreaTimeTemperature
URI: http://qudt.org/vocab/quantitykind/AreaTimeTemperature
Applicable units are those of quantitykind:AreaTimeTemperature
quantitykind:AreicChargeDensityOrElectricFluxDensityOrElectricPolarization
URI: http://qudt.org/vocab/quantitykind/AreicChargeDensityOrElectricFluxDensityOrElectricPolarization
charge Q presented on an area of size A divided by the area A or vector quantity obtained at a given point by adding the electric polarization P to the product of the electric field strength E and the electric constant (permittivity) ε₀
quantitykind:AreicDataVolume
URI: http://qudt.org/vocab/quantitykind/AreicDataVolume
volume of data, which is usually dependent on the respective complexity of the information or its coding procedure, divided by the related area
quantitykind:AreicEnergyFlow
URI: http://qudt.org/vocab/quantitykind/AreicEnergyFlow
energy in a defined direction of propagation through a surface perpendicular to this, divided by its area
Applicable units are those of quantitykind:PowerPerArea
quantitykind:AreicHeatFlowRate
URI: http://qudt.org/vocab/quantitykind/AreicHeatFlowRate
Density of heat flow rate.
Applicable units are those of quantitykind:PowerPerArea
quantitykind:AreicMass
URI: http://qudt.org/vocab/quantitykind/AreicMass
mass divided by the related area
Applicable units are those of quantitykind:MassPerArea
quantitykind:AreicTorque
URI: http://qudt.org/vocab/quantitykind/AreicTorque
ratio of a torque acting on a surface and causing a rotation or shearing divided by this area
quantitykind:Asset
URI: http://qudt.org/vocab/quantitykind/Asset
An Asset is an economic resource owned by a business or company. Simply stated, assets are things of value that can be readily converted into cash (although cash itself is also considered an asset).
quantitykind:AtmosphericHydroxylationRate
URI: http://qudt.org/vocab/quantitykind/AtmosphericHydroxylationRate
A second order reaction rate constant that is a specific second order reaction rate constant that governs the kinetics of an atmospheric, gas-phase reaction between hydroxyl radicals and an organic chemical.
Applicable units are those of quantitykind:AtmosphericHydroxylationRate
quantitykind:AtmosphericPressure
URI: http://qudt.org/vocab/quantitykind/AtmosphericPressure
The pressure exerted by the weight of the air above it at any point on the earth's surface. At sea level the atmosphere will support a column of mercury about $760 mm$ high. This decreases with increasing altitude. The standard value for the atmospheric pressure at sea level in SI units is $101,325 pascals$.
Applicable units are those of quantitykind:ForcePerArea
quantitykind:AtomScatteringFactor
URI: http://qudt.org/vocab/quantitykind/AtomScatteringFactor
"Atom Scattering Factor" is measure of the scattering power of an isolated atom.
Applicable units are those of quantitykind:AtomScatteringFactor
quantitykind:AtomicAttenuationCoefficient
URI: http://qudt.org/vocab/quantitykind/AtomicAttenuationCoefficient
"Atomic Attenuation Coefficient" is a measurement of how strongly a chemical species or substance absorbs or scatters light at a given wavelength, per the number of atoms in the substance.
Applicable units are those of quantitykind:Area
quantitykind:AtomicCharge
URI: http://qudt.org/vocab/quantitykind/AtomicCharge
The electric charge of an ion, equal to the number of electrons the atom has gained or lost in its ionization multiplied by the charge on one electron.
Applicable units are those of quantitykind:ElectricCharge
quantitykind:AtomicEnergy
URI: http://qudt.org/vocab/quantitykind/AtomicEnergy
scalar quantity of elementary particles which is retained within a system following any change and, as saved energy, constitutes the capability of a physical system to carry out work
Applicable units are those of quantitykind:Energy
quantitykind:AtomicMass
URI: http://qudt.org/vocab/quantitykind/AtomicMass
The "Atomic Mass" is the mass of a specific isotope, most often expressed in unified atomic mass units.
Applicable units are those of quantitykind:Mass
quantitykind:AtomicNumber
URI: http://qudt.org/vocab/quantitykind/AtomicNumber
The "Atomic Number", also known as the proton number, is the number of protons found in the nucleus of an atom and therefore identical to the charge number of the nucleus. A nuclide is a species of atom with specified numbers of protons and neutrons. Nuclides with the same value of Z but different values of N are called isotopes of an element. The ordinal number of an element in the periodic table is equal to the atomic number. The atomic number equals the charge of the nucleus in units of the elementary charge.
Applicable units are those of quantitykind:AtomicNumber
quantitykind:AtomicStoppingPower
URI: http://qudt.org/vocab/quantitykind/AtomicStoppingPower
ratio of the linear stopping power to the number density of the atoms in the medium
quantitykind:AttenuationCoefficient
URI: http://qudt.org/vocab/quantitykind/AttenuationCoefficient
The attenuation coefficient is a quantity that characterizes how easily a material or medium can be penetrated by a beam of light, sound, particles, or other energy or matter. A large attenuation coefficient means that the beam is quickly "attenuated" (weakened) as it passes through the medium, and a small attenuation coefficient means that the medium is relatively transparent to the beam. The Attenuation Coefficient is also called linear attenuation coefficient, narrow beam attenuation coefficient, or absorption coefficient.
Applicable units are those of quantitykind:AttenuationCoefficient
quantitykind:AuditoryThresholds
URI: http://qudt.org/vocab/quantitykind/AuditoryThresholds
"Auditory Thresholds" is the thresholds of sensitivity to auditory signals and other input to the ear or the sense of hearing.
Applicable units are those of quantitykind:SoundPowerLevel
quantitykind:AuxillaryMagneticField
URI: http://qudt.org/vocab/quantitykind/AuxillaryMagneticField
Magnetic Fields surround magnetic materials and electric currents and are detected by the force they exert on other magnetic materials and moving electric charges. The electric and magnetic fields are two interrelated aspects of a single object, called the electromagnetic field. A pure electric field in one reference frame is observed as a combination of both an electric field and a magnetic field in a moving reference frame. The Auxillary Magnetic Field, H characterizes how the true Magnetic Field B influences the organization of magnetic dipoles in a given medium.
Applicable units are those of quantitykind:MagneticFieldStrength_H
quantitykind:AverageEnergyLossPerElementaryChargeProduced
URI: http://qudt.org/vocab/quantitykind/AverageEnergyLossPerElementaryChargeProduced
"Average Energy Loss per Elementary Charge Produced" is also referred to as average energy loss per ion pair formed.
Applicable units are those of quantitykind:Energy
quantitykind:AverageHeadEndPressure
URI: http://qudt.org/vocab/quantitykind/AverageHeadEndPressure
Applicable units are those of quantitykind:ForcePerArea
quantitykind:AverageLogarithmicEnergyDecrement
URI: http://qudt.org/vocab/quantitykind/AverageLogarithmicEnergyDecrement
"Average Logarithmic Energy Decrement" is a measure of the amount of energy a neutron loses upon colliding with various nuclei. It is the average value of the increase in lethargy in elastic collisions between neutrons and nuclei whose kinetic energy is negligible compared with that of the neutrons.
Applicable units are those of quantitykind:AverageLogarithmicEnergyDecrement
quantitykind:AverageSpecificImpulse
URI: http://qudt.org/vocab/quantitykind/AverageSpecificImpulse
Avg Specific Impulse (lbf-sec/lbm)
quantitykind:AverageVacuumThrust
URI: http://qudt.org/vocab/quantitykind/AverageVacuumThrust
Applicable units are those of quantitykind:Force
quantitykind:Azimuth
URI: http://qudt.org/vocab/quantitykind/Azimuth
The horizontal angle between an object's orientation frame and a cardinal direction, generally north. In the context of architecture, this would refer to the direction a structure faces relative to the direction north.
Applicable units are those of quantitykind:Angle
quantitykind:BandwidthDistanceProduct
URI: http://qudt.org/vocab/quantitykind/BandwidthDistanceProduct
quantitykind:BandwidthLengthProduct
URI: http://qudt.org/vocab/quantitykind/BandwidthLengthProduct
parameter of transmission media for determination of frequency and length restrictions as reciprocal value of the multimode distortion corresponding to the product of maximum pulse frequency and maximum transmission distance
quantitykind:Basicity
URI: http://qudt.org/vocab/quantitykind/Basicity
Chemicals or substances having a $pH$ higher than 7 are said to be basic; higher $pH$ means higher basicity.
Applicable units are those of quantitykind:Basicity
quantitykind:BatteryCapacity
URI: http://qudt.org/vocab/quantitykind/BatteryCapacity
quantity of electricity or electrical charge which a fully charged battery can supply under specified conditions as a product of discharge current and discharge time
Applicable units are those of quantitykind:BatteryCapacity
quantitykind:BendingMomentOfForce
URI: http://qudt.org/vocab/quantitykind/BendingMomentOfForce
A bending moment exists in a structural element when a moment is applied to the element so that the element bends. It is the component of moment of force perpendicular to the longitudinal axis of a beam or a shaft.
Applicable units are those of quantitykind:Torque
quantitykind:BetaDisintegrationEnergy
URI: http://qudt.org/vocab/quantitykind/BetaDisintegrationEnergy
"Beta Disintegration Energy" is the energy released by a beta particle radioactive decay. It is the sum of the maximum beta-particle kinetic energy and the recoil energy of the atom produced in the reference frame in which the emitting nucleus is at rest before its disintegration.
Applicable units are those of quantitykind:Energy
quantitykind:BevelGearPitchAngle
URI: http://qudt.org/vocab/quantitykind/BevelGearPitchAngle
Pitch angle in bevel gears is the angle between an element of a pitch cone and its axis. In external and internal bevel gears, the pitch angles are respectively less than and greater than 90 degrees.
Applicable units are those of quantitykind:Angle
quantitykind:BindingFraction
URI: http://qudt.org/vocab/quantitykind/BindingFraction
The "Binding Fraction" is the ratio of the binding energy of a nucleus to the atomic mass number.
Applicable units are those of quantitykind:BindingFraction
quantitykind:BioconcentrationFactor
URI: http://qudt.org/vocab/quantitykind/BioconcentrationFactor
The bioconcentration factor is the ratio of the concentration of a chemical substance in biota over the concentration of the same chemical substance in water. It is related to the octanol-water partition coefficient.
Applicable units are those of quantitykind:BioconcentrationFactor
quantitykind:BiodegredationHalfLife
URI: http://qudt.org/vocab/quantitykind/BiodegredationHalfLife
A time that quantifies how long it takes to reduce a substance's concentration by 50% from any concentration point in time in a water or soil environment by either bacteria or another living organism.
Applicable units are those of quantitykind:BiodegredationHalfLife
quantitykind:BiogeochemicalRate
URI: http://qudt.org/vocab/quantitykind/BiogeochemicalRate
the rate at which a specific chemical element or compound is processed or transformed, as amount per unit mass of the relevant material Unreduced, SI unit is mole * kg-1 * s-1
quantitykind:BitDataVolume
URI: http://qudt.org/vocab/quantitykind/BitDataVolume
name for a particular quantity of data on the basis of the binary digit "Bit" (basic indissoluble information unit) which can only assume a state of 1 or 0
quantitykind:BitRate
URI: http://qudt.org/vocab/quantitykind/BitRate
Applicable units are those of quantitykind:BitRate
quantitykind:BitTransmissionRate
URI: http://qudt.org/vocab/quantitykind/BitTransmissionRate
speed with which one bit will be transmitted per second
Applicable units are those of quantitykind:BitRate
quantitykind:BloodGlucoseLevel
URI: http://qudt.org/vocab/quantitykind/BloodGlucoseLevel
Blood sugar level, blood sugar concentration, or blood glucose level is the amount of glucose present in the blood of humans and animals. Glucose is a simple sugar and approximately 4 grams of glucose are present in the blood of humans at all times. Stored in skeletal muscle and liver cells in the form of glycogen, the body tightly regulates blood glucose levels as a part of metabolic homeostasis. During fasting blood glucose is maintained at a constant level at the expense of the glycogen stores in the liver and skeletal muscle. There are two main methods of describing concentrations: by weight, and by molecular count. Weights are in grams and molecular counts in moles. A mole is $6.022\times 10^{23}$ molecules. In both cases, the unit is usually modified by $milli-$ or $micro-$ or other prefix, and is always $per$ some volume, often a litre. Conversion factors depend on the molecular weight of the substance in question. $mmol/L$ is millimoles/liter, and is the world standard unit for measuring glucose in blood. Specifically, it is the designated SI (Systeme International) unit. Some countries use $mg/dl$. A mole is about $6\times 10^{23}$ molecules. $mg/dL$ (milligrams/deciliter) is the traditional unit for measuring $bG$ (blood glucose). There is a trend toward using $mmol/L$ however $mg/dL$ is much in practice. Some use is made of $mmol/L$ as the primary unit with $mg/dL$ quoted in parentheses. This acknowledges the large base of health care providers, researchers and patients who are already familiar with $mg/dL$.
citation: https://en.wikipedia.org/wiki/Blood_sugar_level
quantitykind:BloodGlucoseLevel_Mass
URI: http://qudt.org/vocab/quantitykind/BloodGlucoseLevel_Mass
Blood sugar level, blood sugar concentration, or blood glucose level is the amount of glucose present in the blood of humans and animals. Glucose is a simple sugar and approximately 4 grams of glucose are present in the blood of humans at all times. Stored in skeletal muscle and liver cells in the form of glycogen, the body tightly regulates blood glucose levels as a part of metabolic homeostasis. During fasting blood glucose is maintained at a constant level at the expense of the glycogen stores in the liver and skeletal muscle. There are two main methods of describing concentrations: by weight, and by molecular count. Weights are in grams and molecular counts in moles. A mole is $6.022\times 10^{23}$ molecules. In both cases, the unit is usually modified by $milli-$ or $micro-$ or other prefix, and is always $per$ some volume, often a litre. Conversion factors depend on the molecular weight of the substance in question. $mmol/L$ is millimoles/liter, and is the world standard unit for measuring glucose in blood. Specifically, it is the designated SI (Systeme International) unit. Some countries use $mg/dl$. A mole is about $6\times 10^{23}$ molecules. $mg/dL$ (milligrams/deciliter) is the traditional unit for measuring $bG$ (blood glucose). There is a trend toward using $mmol/L$ however $mg/dL$ is much in practice. Some use is made of $mmol/L$ as the primary unit with $mg/dL$ quoted in parentheses. This acknowledges the large base of health care providers, researchers and patients who are already familiar with $mg/dL$.
citation: https://en.wikipedia.org/wiki/Blood_sugar_level
quantitykind:BodyMassIndex
URI: http://qudt.org/vocab/quantitykind/BodyMassIndex
$\textit{Body Mass Index}$, BMI, is an index of weight for height, calculated as: $BMI = \frac{M_{body}}{H^2}$, where $M_{body}$ is body mass in kg, and $H$ is height in metres. The BMI has been used as a guideline for defining whether a person is overweight because it minimizes the effect of height, but it does not take into consideration other important factors, such as age and body build. The BMI has also been used as an indicator of obesity on the assumption that the higher the index, the greater the level of body fat.
Applicable units are those of quantitykind:BodyMassIndex
quantitykind:BoilingPoint
URI: http://qudt.org/vocab/quantitykind/BoilingPoint
A temperature that is the one at which a substance will change its physical state from a liquid to a gas. It is also the temperature where the liquid and gaseous forms of a pure substance can exist in equilibrium.
Applicable units are those of quantitykind:BoilingPoint
quantitykind:BraggAngle
URI: http://qudt.org/vocab/quantitykind/BraggAngle
"Bragg Angle" describes the condition for a plane wave to be diffracted from a family of lattice planes, the angle between the wavevector of the incident plane wave, and the lattice planes.
Applicable units are those of quantitykind:Angle
quantitykind:Breadth
URI: http://qudt.org/vocab/quantitykind/Breadth
"Breadth" is the extent or measure of how broad or wide something is.
Applicable units are those of quantitykind:Length
quantitykind:BucklingFactor
URI: http://qudt.org/vocab/quantitykind/BucklingFactor
Applicable units are those of quantitykind:Dimensionless
quantitykind:BulkModulus
URI: http://qudt.org/vocab/quantitykind/BulkModulus
The bulk modulus of a substance measures the substance's resistance to uniform compression. It is defined as the ratio of the infinitesimal pressure increase to the resulting relative decrease of the volume.
Applicable units are those of quantitykind:BulkModulus
quantitykind:BurgersVector
URI: http://qudt.org/vocab/quantitykind/BurgersVector
"Burgers Vector" is the vector characterizing a dislocation, i.e. the closing vector in a Burgers circuit encircling a dislocation line.
Applicable units are those of quantitykind:Length
quantitykind:BurnRate
URI: http://qudt.org/vocab/quantitykind/BurnRate
Applicable units are those of quantitykind:Velocity
quantitykind:BurnTime
URI: http://qudt.org/vocab/quantitykind/BurnTime
Applicable units are those of quantitykind:Time
quantitykind:BurstFactor
URI: http://qudt.org/vocab/quantitykind/BurstFactor
bursting pressure divided by areic mass
Applicable units are those of quantitykind:BurstFactor
quantitykind:ByteDataVolume
URI: http://qudt.org/vocab/quantitykind/ByteDataVolume
particular quantity of data based on a string consisting of 8 bits
Applicable units are those of quantitykind:Count
quantitykind:ByteRate
URI: http://qudt.org/vocab/quantitykind/ByteRate
Applicable units are those of quantitykind:ByteRate
quantitykind:ByteTransmissionRate
URI: http://qudt.org/vocab/quantitykind/ByteTransmissionRate
speed with which 8 bits are transmitted
Applicable units are those of quantitykind:ByteRate
quantitykind:CENTER-OF-GRAVITY_X
URI: http://qudt.org/vocab/quantitykind/CENTER-OF-GRAVITY_X
Applicable units are those of quantitykind:Length
quantitykind:CENTER-OF-GRAVITY_Y
URI: http://qudt.org/vocab/quantitykind/CENTER-OF-GRAVITY_Y
Applicable units are those of quantitykind:Length
quantitykind:CENTER-OF-GRAVITY_Z
URI: http://qudt.org/vocab/quantitykind/CENTER-OF-GRAVITY_Z
Applicable units are those of quantitykind:Length
quantitykind:CENTER-OF-MASS
URI: http://qudt.org/vocab/quantitykind/CENTER-OF-MASS
The point at which the distributed mass of a composite body can be acted upon by a force without inducing any rotation of the composite body.
Applicable units are those of quantitykind:Length
quantitykind:CO2Equivalent
URI: http://qudt.org/vocab/quantitykind/CO2Equivalent
The CO2 equivalent is a measure used to compare the emissions from various greenhouse gases on the basis of their global-warming potential (GWP), by converting amounts of other gases to the equivalent amount of carbon dioxide with the same global warming potential.
Applicable units are those of quantitykind:CO2Equivalent
quantitykind:CONTRACT-END-ITEM-SPECIFICATION-MASS
URI: http://qudt.org/vocab/quantitykind/CONTRACT-END-ITEM-SPECIFICATION-MASS
Contractual mass requirement of a delivered item. Note that The term 'control mass' is sometimes utilized as a limit in lieu of CEI mass when a CEI mass does not exist. The term 'Interface Control Document Mass' is another alternative for specifying a contractual mass requirement.
Applicable units are those of quantitykind:Mass
quantitykind:CONTROL-MASS
URI: http://qudt.org/vocab/quantitykind/CONTROL-MASS
The upper design gross mass limit of a system at a specified mission event against which margins are calculated after accounting for basic masses of flight hardware, MGA, and uncertainties. It may include propellants, crew, and cargo.
Applicable units are those of quantitykind:Mass
quantitykind:CanonicalPartitionFunction
URI: http://qudt.org/vocab/quantitykind/CanonicalPartitionFunction
A "Canonical Partition Function" applies to a canonical ensemble, in which the system is allowed to exchange heat with the environment at fixed temperature, volume, and number of particles.
Applicable units are those of quantitykind:CanonicalPartitionFunction
quantitykind:Capacitance
URI: http://qudt.org/vocab/quantitykind/Capacitance
"Capacitance" is the ability of a body to hold an electrical charge; it is quantified as the amount of electric charge stored for a given electric potential. Capacitance is a scalar-valued quantity.
Applicable units are those of quantitykind:Capacitance
quantitykind:Capacity
URI: http://qudt.org/vocab/quantitykind/Capacity
In computer operations, (a) the largest quantity which can be stored, processed, or transferred; (b) the largest number of digits or characters which may regularly be processed; (c) the upper and lower limits of the quantities which may be processed. In other contexts, the amount of material that can be stored, such as fuel or food.
quantitykind:CarrierLifetime
URI: http://qudt.org/vocab/quantitykind/CarrierLifetime
"Carrier LifetIme" is a time constant for recombination or trapping of minority charge carriers in semiconductors.
Applicable units are those of quantitykind:Time
quantitykind:CartesianArea
URI: http://qudt.org/vocab/quantitykind/CartesianArea
"Area" is a quantity that expresses the extent of a two-dimensional surface or shape, or planar lamina, in the plane.
Applicable units are those of quantitykind:Area
quantitykind:CartesianCoordinates
URI: http://qudt.org/vocab/quantitykind/CartesianCoordinates
"Cartesian Coordinates" specify each point uniquely in a plane by a pair of numerical coordinates, which are the signed distances from the point to two fixed perpendicular directed lines, measured in the same unit of length.
Applicable units are those of quantitykind:Length
quantitykind:CartesianVolume
URI: http://qudt.org/vocab/quantitykind/CartesianVolume
"Volume" is the quantity of three-dimensional space enclosed by some closed boundary, for example, the space that a substance (solid, liquid, gas, or plasma) or shape occupies or contains.
Applicable units are those of quantitykind:Volume
quantitykind:CatalyticActivity
URI: http://qudt.org/vocab/quantitykind/CatalyticActivity
An index of the actual or potential activity of a catalyst. The catalytic activity of an enzyme or an enzyme-containing preparation is defined as the property measured by the increase in the rate of conversion of a specified chemical reaction that the enzyme produces in a specified assay system. Catalytic activity is an extensive quantity and is a property of the enzyme, not of the reaction mixture; it is thus conceptually different from rate of conversion although measured by and equidimensional with it. The unit for catalytic activity is the $katal$; it may also be expressed in mol $s^{-1}$. Dimensions: $N T^{-1}$. Former terms such as catalytic ability, catalytic amount, and enzymic activity are no er recommended. Derived quantities are molar catalytic activity, specific catalytic activity, and catalytic activity concentration. Source(s): www.answers.com
Applicable units are those of quantitykind:CatalyticActivity
quantitykind:CatalyticActivityConcentration
URI: http://qudt.org/vocab/quantitykind/CatalyticActivityConcentration
The catalytic activity of an enzyme per unit volume, where volume refers to that of the original enzyme‐containing preparation, not that of the assay system. It may be expressed in katals per litre.
Applicable units are those of quantitykind:CatalyticActivityConcentration
quantitykind:CelsiusTemperature
URI: http://qudt.org/vocab/quantitykind/CelsiusTemperature
"Celsius Temperature", the thermodynamic temperature T_0, is exactly 0.01 kelvin below the thermodynamic temperature of the triple point of water.
Applicable units are those of quantitykind:ThermodynamicTemperature
quantitykind:CenterOfGravity_X
URI: http://qudt.org/vocab/quantitykind/CenterOfGravity_X
Applicable units are those of quantitykind:Length
quantitykind:CenterOfGravity_Y
URI: http://qudt.org/vocab/quantitykind/CenterOfGravity_Y
Applicable units are those of quantitykind:Length
quantitykind:CenterOfGravity_Z
URI: http://qudt.org/vocab/quantitykind/CenterOfGravity_Z
Applicable units are those of quantitykind:Length
quantitykind:CharacteristicAcousticImpedance
URI: http://qudt.org/vocab/quantitykind/CharacteristicAcousticImpedance
Characteristic impedance at a point in a non-dissipative medium and for a plane progressive wave, the quotient of the sound pressure $p$ by the component of the sound particle velocity $v$ in the direction of the wave propagation.
Applicable units are those of quantitykind:AcousticImpedance
quantitykind:CharacteristicNumber
URI: http://qudt.org/vocab/quantitykind/CharacteristicNumber
quantity of dimension one (as a result of measuring technology theory) which clarifies facts, states or developments and is used as a scale e.g. to represent causes and effects of events
Applicable units are those of quantitykind:Dimensionless
quantitykind:CharacteristicVelocity
URI: http://qudt.org/vocab/quantitykind/CharacteristicVelocity
Characteristic velocity or $c^{*}$ is a measure of the combustion performance of a rocket engine independent of nozzle performance, and is used to compare different propellants and propulsion systems.
Applicable units are those of quantitykind:Velocity
quantitykind:ChargeNumber
URI: http://qudt.org/vocab/quantitykind/ChargeNumber
The "Charge Number", or just valance of an ion is the coefficient that, when multiplied by the elementary charge, gives the ion's charge.
Applicable units are those of quantitykind:ChargeNumber
quantitykind:ChemicalAffinity
URI: http://qudt.org/vocab/quantitykind/ChemicalAffinity
In chemical physics and physical chemistry, "Chemical Affinity" is the electronic property by which dissimilar chemical species are capable of forming chemical compounds. Chemical affinity can also refer to the tendency of an atom or compound to combine by chemical reaction with atoms or compounds of unlike composition.
Applicable units are those of quantitykind:ChemicalAffinity
quantitykind:ChemicalConsumptionPerMass
URI: http://qudt.org/vocab/quantitykind/ChemicalConsumptionPerMass
Applicable units are those of quantitykind:SpecificVolume
quantitykind:ChemicalPotential
URI: http://qudt.org/vocab/quantitykind/ChemicalPotential
"Chemical Potential", also known as partial molar free energy, is a form of potential energy that can be absorbed or released during a chemical reaction.
Applicable units are those of quantitykind:MolarEnergy
quantitykind:Chromaticity
URI: http://qudt.org/vocab/quantitykind/Chromaticity
Chromaticity is an objective specification of the quality of a color regardless of its luminance
Applicable units are those of quantitykind:Chromaticity
quantitykind:Circulation
URI: http://qudt.org/vocab/quantitykind/Circulation
In fluid dynamics, circulation is the line integral around a closed curve of the fluid velocity. It has dimensions of length squared over time.
Applicable units are those of quantitykind:AreaPerTime
quantitykind:ClosestApproachRadius
URI: http://qudt.org/vocab/quantitykind/ClosestApproachRadius
Applicable units are those of quantitykind:Length
quantitykind:CoefficientOfHeatTransfer
URI: http://qudt.org/vocab/quantitykind/CoefficientOfHeatTransfer
"Coefficient of Heat Transfer", in thermodynamics and in mechanical and chemical engineering, is used in calculating the heat transfer, typically by convection or phase transition between a fluid and a solid. The heat transfer coefficient is the proportionality coefficient between the heat flux, that is heat flow per unit area, q/A, and the thermodynamic driving force for the flow of heat (that is, the temperature difference, (Delta T). Areic heat flow rate divided by thermodynamic temperature difference. In building technology, the "Coefficient of Heat Transfer", is often called "thermal transmittance}" with the symbol "U". It has SI units in watts per squared meter kelvin.
Applicable units are those of quantitykind:CoefficientOfHeatTransfer
quantitykind:CoefficientOfPerformance
URI: http://qudt.org/vocab/quantitykind/CoefficientOfPerformance
"Coefficient of Performance",is a measure of the efficiency of a heating or cooling system, defined as the ratio of useful heating or cooling output to the energy input required to achieve it.
Applicable units are those of quantitykind:CoefficientOfPerformance
quantitykind:Coercivity
URI: http://qudt.org/vocab/quantitykind/Coercivity
$\textit{Coercivity}$, also referred to as $\textit{Coercive Field Strength}$, is the magnetic field strength to be applied to bring the magnetic flux density in a substance from its remaining magnetic flux density to zero. This is defined as the coercive field strength in a substance when either the magnetic flux density or the magnetic polarization and magnetization is brought from its value at magnetic saturation to zero by monotonic reduction of the applied magnetic field strength. The quantity which is brought to zero should be stated, and the appropriate symbol used: $H_{cB}$, $H_{cJ}$ or $H_{cM}$ for the coercivity relating to the magnetic flux density, the magnetic polarization or the magnetization respectively, where $H_{cJ} = H_{cM}$.
Applicable units are those of quantitykind:Coercivity
quantitykind:CoherenceLength
URI: http://qudt.org/vocab/quantitykind/CoherenceLength
"Coherence Length" characterizes the distance in a superconductor over which the effect of a perturbation is appreciable.
Applicable units are those of quantitykind:Length
quantitykind:ColdReceptorThreshold
URI: http://qudt.org/vocab/quantitykind/ColdReceptorThreshold
"Cold Receptor Threshold" is the threshold of cold-sensitive free nerve-ending.
Applicable units are those of quantitykind:Temperature
quantitykind:CombinedNonEvaporativeHeatTransferCoefficient
URI: http://qudt.org/vocab/quantitykind/CombinedNonEvaporativeHeatTransferCoefficient
"Combined Non Evaporative Heat Transfer Coefficient" is the
Applicable units are those of quantitykind:CombinedNonEvaporativeHeatTransferCoefficient
quantitykind:CombustionChamberTemperature
URI: http://qudt.org/vocab/quantitykind/CombustionChamberTemperature
Applicable units are those of quantitykind:ThermodynamicTemperature
quantitykind:ComplexFrequency_Real
URI: http://qudt.org/vocab/quantitykind/ComplexFrequency_Real
Applicable units are those of quantitykind:Frequency
quantitykind:ComplexPower
URI: http://qudt.org/vocab/quantitykind/ComplexPower
$\textit{Complex Power}$, under sinusoidal conditions, is the product of the phasor $\mathbf{U}$ representing the voltage between the terminals of a linear two-terminal element, or two-terminal circuit and the complex conjugate of the phasor $I$ representing the electric current in the element or circuit.
Applicable units are those of quantitykind:ComplexPower
quantitykind:CompoundPlaneAngle
URI: http://qudt.org/vocab/quantitykind/CompoundPlaneAngle
A "Compound Plane Angle" is a compound measure of plane angle in degrees, minutes, seconds, and optionally millionth-seconds of arc.
Applicable units are those of quantitykind:PlaneAngle
quantitykind:Compressibility
URI: http://qudt.org/vocab/quantitykind/Compressibility
Compressibility is a measure of the relative volume change of a fluid or solid as a response to a pressure (or mean stress) change.
Applicable units are those of quantitykind:Compressibility
quantitykind:CompressibilityFactor
URI: http://qudt.org/vocab/quantitykind/CompressibilityFactor
The compressibility factor ($Z$) is a useful thermodynamic property for modifying the ideal gas law to account for the real gas behaviour. The closer a gas is to a phase change, the larger the deviations from ideal behavior. It is simply defined as the ratio of the molar volume of a gas to the molar volume of an ideal gas at the same temperature and pressure. Values for compressibility are calculated using equations of state (EOS), such as the virial equation and van der Waals equation. The compressibility factor for specific gases can be obtained, with out calculation, from compressibility charts. These charts are created by plotting Z as a function of pressure at constant temperature.
Applicable units are those of quantitykind:DimensionlessRatio
quantitykind:Concentration
URI: http://qudt.org/vocab/quantitykind/Concentration
In chemistry, concentration is defined as the abundance of a constituent divided by the total volume of a mixture. Furthermore, in chemistry, four types of mathematical description can be distinguished: mass concentration, molar concentration, number concentration, and volume concentration. The term concentration can be applied to any kind of chemical mixture, but most frequently it refers to solutes in solutions.
Applicable units are those of quantitykind:Concentration
quantitykind:Conductance
URI: http://qudt.org/vocab/quantitykind/Conductance
$\textit{Conductance}$, for a resistive two-terminal element or two-terminal circuit with terminals A and B, quotient of the electric current i in the element or circuit by the voltage $u_{AB}$ between the terminals: $G = \frac{1}{R}$, where the electric current is taken as positive if its direction is from A to B and negative in the opposite case. The conductance of an element or circuit is the inverse of its resistance.
Applicable units are those of quantitykind:Conductance
quantitykind:ConductionSpeed
URI: http://qudt.org/vocab/quantitykind/ConductionSpeed
"Conduction Speed" is the speed of impulses in nerve fibers.
Applicable units are those of quantitykind:ConductionSpeed
quantitykind:ConductiveHeatTransferRate
URI: http://qudt.org/vocab/quantitykind/ConductiveHeatTransferRate
"Conductive Heat Transfer Rate" is proportional to temperature gradient and area of contact.
Applicable units are those of quantitykind:HeatFlowRate
quantitykind:Conductivity
URI: http://qudt.org/vocab/quantitykind/Conductivity
$\textit{Conductivity}$ is a scalar or tensor quantity the product of which by the electric field strength in a medium is equal to the electric current density. For an isotropic medium the conductivity is a scalar quantity; for an anisotropic medium it is a tensor quantity. $$\mathbf{J} = \sigma \mathbf{E}$$ Where $\mathbf{J}$ is electric current density, and $\mathbf{E}$ is electric field strength.
Applicable units are those of quantitykind:Conductivity
quantitykind:ConductivityVariance_NEON
URI: http://qudt.org/vocab/quantitykind/ConductivityVariance_NEON
Variance for NEON conductivity data measured in MicroS-PER-CM
Applicable units are those of quantitykind:ConductivityVariance_NEON
quantitykind:Constringence
URI: http://qudt.org/vocab/quantitykind/Constringence
In optics and lens design, constringence of a transparent material, also known as the Abbe number or the V-number, is an approximate measure of the material's dispersion (change of refractive index versus wavelength), with high values of V indicating low dispersion.
Applicable units are those of quantitykind:Constringence
quantitykind:ConvectiveHeatTransfer
URI: http://qudt.org/vocab/quantitykind/ConvectiveHeatTransfer
"Convective Heat Transfer" is convective heat transfer coefficient multiplied by temperature difference and exchange area.
Applicable units are those of quantitykind:HeatFlowRate
quantitykind:CostPerArea
URI: http://qudt.org/vocab/quantitykind/CostPerArea
Applicable units are those of quantitykind:CostPerArea
quantitykind:CostPerEnergy
URI: http://qudt.org/vocab/quantitykind/CostPerEnergy
Applicable units are those of quantitykind:CostPerEnergy
quantitykind:CostPerMass
URI: http://qudt.org/vocab/quantitykind/CostPerMass
Applicable units are those of quantitykind:CostPerMass
quantitykind:CostPerPower
URI: http://qudt.org/vocab/quantitykind/CostPerPower
Applicable units are those of quantitykind:CostPerPower
quantitykind:Count
URI: http://qudt.org/vocab/quantitykind/Count
"Count" is the value of a count of items.
Applicable units are those of quantitykind:Count
quantitykind:CountRate
URI: http://qudt.org/vocab/quantitykind/CountRate
A measure of a number of items counted per time period.
Applicable units are those of quantitykind:CountRate
quantitykind:CouplingFactor
URI: http://qudt.org/vocab/quantitykind/CouplingFactor
"Coupling Factor" is the ratio of an electromagnetic quantity, usually voltage or current, appearing at a specified location of a given circuit to the corresponding quantity at a specified location in the circuit from which energy is transferred by coupling.
Applicable units are those of quantitykind:CouplingFactor
quantitykind:CrossSection
URI: http://qudt.org/vocab/quantitykind/CrossSection
"Cross-section" is used to express the likelihood of interaction between particles. For a specified target particle and for a specified reaction or process produced by incident charged or uncharged particles of specified type and energy, it is the mean number of such reactions or processes divided by the incident-particle fluence.
Applicable units are those of quantitykind:Area
quantitykind:CrossSectionalArea
URI: http://qudt.org/vocab/quantitykind/CrossSectionalArea
Applicable units are those of quantitykind:Area
quantitykind:CubicExpansionCoefficient
URI: http://qudt.org/vocab/quantitykind/CubicExpansionCoefficient
Applicable units are those of quantitykind:ExpansionRatio
quantitykind:CurieTemperature
URI: http://qudt.org/vocab/quantitykind/CurieTemperature
"Curie Temperature" is the critical thermodynamic temperature of a ferromagnet.
Applicable units are those of quantitykind:Temperature
quantitykind:Currency
URI: http://qudt.org/vocab/quantitykind/Currency
Applicable units are those of quantitykind:Currency
quantitykind:CurrencyPerFlight
URI: http://qudt.org/vocab/quantitykind/CurrencyPerFlight
Applicable units are those of quantitykind:CurrencyPerFlight
quantitykind:CurrentLinkage
URI: http://qudt.org/vocab/quantitykind/CurrentLinkage
"Current Linkage" is the net electric current through a surface delimited by a closed loop.
Applicable units are those of quantitykind:CurrentLinkage
quantitykind:CurrentOfTheAmountOfSubstance
URI: http://qudt.org/vocab/quantitykind/CurrentOfTheAmountOfSubstance
ratio of the amount of substance divided by the related time
quantitykind:Curvature
URI: http://qudt.org/vocab/quantitykind/Curvature
The canonical example of extrinsic curvature is that of a circle, which has curvature equal to the inverse of its radius everywhere. Smaller circles bend more sharply, and hence have higher curvature. The curvature of a smooth curve is defined as the curvature of its osculating circle at each point. The osculating circle of a sufficiently smooth plane curve at a given point on the curve is the circle whose center lies on the inner normal line and whose curvature is the same as that of the given curve at that point. This circle is tangent to the curve at the given point. The magnitude of curvature at points on physical curves can be measured in $diopters$ (also spelled $dioptre$) — this is the convention in optics.
Applicable units are those of quantitykind:Curvature
quantitykind:CurvatureFromRadius
URI: http://qudt.org/vocab/quantitykind/CurvatureFromRadius
In mathematics "Curvature" is the amount by which a geometric object deviates from being flat, or straight in the case of a line, but this is defined in different ways depending on the context.
Applicable units are those of quantitykind:CurvatureFromRadius
quantitykind:CutoffCurrentRating
URI: http://qudt.org/vocab/quantitykind/CutoffCurrentRating
cut-off current parameter as rating for fuses and switches, derived from the so-called Joule integral
quantitykind:CyclotronAngularFrequency
URI: http://qudt.org/vocab/quantitykind/CyclotronAngularFrequency
The "Cyclotron Angular Frequency" describes angular momentum vector precession about the external field axis with an angular frequency.
Applicable units are those of quantitykind:AngularFrequency
quantitykind:DELTA-V
URI: http://qudt.org/vocab/quantitykind/DELTA-V
The change in translational velocity including all losses for a propulsive system or module. Delta-V losses include, but are not limited to, gravity losses and steering losses.
Applicable units are those of quantitykind:Velocity
quantitykind:DRY-MASS
URI: http://qudt.org/vocab/quantitykind/DRY-MASS
Mass of a system without the propellants, pressurants, reserve or residual fluids, personnel and personnel provisions, and cargo.
Applicable units are those of quantitykind:Mass
quantitykind:DataRate
URI: http://qudt.org/vocab/quantitykind/DataRate
The frequency derived from the period of time required to transmit one bit. This represents the amount of data transferred per second by a communications channel or a computing or storage device. Data rate is measured in units of bits per second (written "b/s" or "bps"), bytes per second (Bps), or baud. When applied to data rate, the multiplier prefixes "kilo-", "mega-", "giga-", etc. (and their abbreviations, "k", "M", "G", etc.) always denote powers of 1000. For example, 64 kbps is 64,000 bits per second. This contrasts with units of storage which use different prefixes to denote multiplication by powers of 1024, for example 1 kibibit = 1024 bits.
Applicable units are those of quantitykind:DataRate
quantitykind:DataTransmissionRate
URI: http://qudt.org/vocab/quantitykind/DataTransmissionRate
quantitykind:DatasetOfBits
URI: http://qudt.org/vocab/quantitykind/DatasetOfBits
Applicable units are those of quantitykind:DatasetOfBits
quantitykind:Debye-WallerFactor
URI: http://qudt.org/vocab/quantitykind/Debye-WallerFactor
"Debye-Waller Factor" (DWF), named after Peter Debye and Ivar Waller, is used in condensed matter physics to describe the attenuation of x-ray scattering or coherent neutron scattering caused by thermal motion. Also, a factor by which the intensity of a diffraction line is reduced because of the lattice vibrations.
Applicable units are those of quantitykind:Debye-WallerFactor
quantitykind:DebyeAngularFrequency
URI: http://qudt.org/vocab/quantitykind/DebyeAngularFrequency
"Debye Angular Frequency" is the cut-off angular frequency in the Debye model of the vibrational spectrum of a solid.
Applicable units are those of quantitykind:AngularFrequency
quantitykind:DebyeAngularWavenumber
URI: http://qudt.org/vocab/quantitykind/DebyeAngularWavenumber
"Debye Angular Wavenumber" is the cut-off angular wavenumber in the Debye model of the vibrational spectrum of a solid.
Applicable units are those of quantitykind:DebyeAngularWavenumber
quantitykind:DebyeTemperature
URI: http://qudt.org/vocab/quantitykind/DebyeTemperature
"Debye Temperature" is the temperature at which the highest-frequency mode (and hence all modes) are excited.
Applicable units are those of quantitykind:Temperature
quantitykind:DecayConstant
URI: http://qudt.org/vocab/quantitykind/DecayConstant
The "Decay Constant" is the proportionality between the size of a population of radioactive atoms and the rate at which the population decreases because of radioactive decay.
Applicable units are those of quantitykind:DecayConstant
quantitykind:DegreeOfDissociation
URI: http://qudt.org/vocab/quantitykind/DegreeOfDissociation
The "Degree of Dissociation" is the fraction of original solute molecules that have dissociated.
Applicable units are those of quantitykind:DegreeOfDissociation
quantitykind:Density
URI: http://qudt.org/vocab/quantitykind/Density
The mass density or density of a material is defined as its mass per unit volume. The symbol most often used for density is $\rho$. Mathematically, density is defined as mass divided by volume: $\rho = m/V$, where $\rho$ is the density, $m$ is the mass, and $V$ is the volume. In some cases, density is also defined as its weight per unit volume, although this quantity is more properly called specific weight.
Applicable units are those of quantitykind:Density
quantitykind:DensityInCombustionChamber
URI: http://qudt.org/vocab/quantitykind/DensityInCombustionChamber
Applicable units are those of quantitykind:MassDensity
quantitykind:DensityOfStates
URI: http://qudt.org/vocab/quantitykind/DensityOfStates
"Density of States" is the number of vibrational modes in an infinitesimal interval of angular frequency divided by the range of that interval and by volume.
Applicable units are those of quantitykind:DensityOfStates
quantitykind:DensityOfTheExhaustGases
URI: http://qudt.org/vocab/quantitykind/DensityOfTheExhaustGases
Applicable units are those of quantitykind:Density
quantitykind:Depth
URI: http://qudt.org/vocab/quantitykind/Depth
Depth typically refers to the vertical measure of length from the surface of a liquid.
Applicable units are those of quantitykind:Length
quantitykind:DewPointTemperature
URI: http://qudt.org/vocab/quantitykind/DewPointTemperature
"Dew Point Temperature" is the temperature at which vapour in air reaches saturation.
Applicable units are those of quantitykind:Temperature
quantitykind:Diameter
URI: http://qudt.org/vocab/quantitykind/Diameter
In classical geometry, the "Diameter" of a circle is any straight line segment that passes through the center of the circle and whose endpoints lie on the circle.
Applicable units are those of quantitykind:Length
quantitykind:DiastolicBloodPressure
URI: http://qudt.org/vocab/quantitykind/DiastolicBloodPressure
The pressure of blood in the arteries which rises to a maximum as blood is pumped out by the left ventricle (systole) and drops to a minimum in diastole. The systolic/diastolic pressure is normally ~120/80 mmHg in a young adult.
Applicable units are those of quantitykind:ForcePerArea
quantitykind:DiffusionArea
URI: http://qudt.org/vocab/quantitykind/DiffusionArea
"Diffusion Area" in an infinite homogenous medium, is one-sixth of the mean square distance between the point where a neutron enters a specified class and the point where it leaves that class.
Applicable units are those of quantitykind:Area
quantitykind:DiffusionCoefficient
URI: http://qudt.org/vocab/quantitykind/DiffusionCoefficient
The "Diffusion Coefficient" is a proportionality constant between the molar flux due to molecular diffusion and the gradient in the concentration of the species (or the driving force for diffusion). Diffusivity is encountered in Fick's law and numerous other equations of physical chemistry.
Applicable units are those of quantitykind:DiffusionCoefficient
quantitykind:DiffusionCoefficientForFluenceRate
URI: http://qudt.org/vocab/quantitykind/DiffusionCoefficientForFluenceRate
The "Diffusion Coefficient for Fluence Rate" is a proportionality constant between the .
Applicable units are those of quantitykind:Length
quantitykind:DiffusionLength
URI: http://qudt.org/vocab/quantitykind/DiffusionLength
"Diffusion Length" is the average distance traveled by a particle, or a thermal neutron in a nuclear reactor, from the point at which it is formed to the point at which it is absorbed.
Applicable units are those of quantitykind:Length
quantitykind:DigitRate
URI: http://qudt.org/vocab/quantitykind/DigitRate
Applicable units are those of quantitykind:DigitRate
quantitykind:Dimensionless
URI: http://qudt.org/vocab/quantitykind/Dimensionless
In dimensional analysis, a dimensionless quantity or quantity of dimension one is a quantity without an associated physical dimension. It is thus a "pure" number, and as such always has a dimension of 1. Dimensionless quantities are widely used in mathematics, physics, engineering, economics, and in everyday life (such as in counting). Numerous well-known quantities, such as $\pi$, $\epsilon$, and $\psi$, are dimensionless. By contrast, non-dimensionless quantities are measured in units of length, area, time, etc. Dimensionless quantities are often defined as products or ratios of quantities that are not dimensionless, but whose dimensions cancel out when their powers are multiplied.
Applicable units are those of quantitykind:Dimensionless
quantitykind:DimensionlessRatio
URI: http://qudt.org/vocab/quantitykind/DimensionlessRatio
Applicable units are those of quantitykind:DimensionlessRatio
quantitykind:Displacement
URI: http://qudt.org/vocab/quantitykind/Displacement
"Displacement" is the shortest distance from the initial to the final position of a point P.
Applicable units are those of quantitykind:Length
quantitykind:DisplacementCurrent
URI: http://qudt.org/vocab/quantitykind/DisplacementCurrent
"Displacement Current" is a quantity appearing in Maxwell's equations that is defined in terms of the rate of change of electric displacement field. Displacement current has the units of electric current density, and it has an associated magnetic field just as actual currents do. However it is not an electric current of moving charges, but a time-varying electric field. In materials, there is also a contribution from the slight motion of charges bound in atoms, dielectric polarization.
Applicable units are those of quantitykind:DisplacementCurrent
quantitykind:DisplacementCurrentDensity
URI: http://qudt.org/vocab/quantitykind/DisplacementCurrentDensity
$\text{Displacement Current Density}$ is the time rate of change of the $\textit{Electric Flux Density}$. This is a measure of how quickly the electric field changes if we observe it as a function of time. This is different than if we look at how the electric field changes spatially, that is, over a region of space for a fixed amount of time.
Applicable units are those of quantitykind:DisplacementCurrentDensity
quantitykind:DisplacementVectorOfIon
URI: http://qudt.org/vocab/quantitykind/DisplacementVectorOfIon
"Displacement Vector of Ion" is the .
Applicable units are those of quantitykind:Length
quantitykind:Dissipance
URI: http://qudt.org/vocab/quantitykind/Dissipance
Dissipance, or dissipation factor for sound power, is the ratio of dissipated sound power to incident sound power. The dissipation factor (DF) is a measure of loss-rate of energy of a mode of oscillation (mechanical, electrical, or electromechanical) in a dissipative system. It is the reciprocal of quality factor, which represents the quality of oscillation.
Applicable units are those of quantitykind:Dissipance
quantitykind:Distance
URI: http://qudt.org/vocab/quantitykind/Distance
"Distance" is a numerical description of how far apart objects are.
Applicable units are those of quantitykind:Distance
quantitykind:DistanceTraveledDuringBurn
URI: http://qudt.org/vocab/quantitykind/DistanceTraveledDuringBurn
Applicable units are those of quantitykind:Distance
quantitykind:DonorDensity
URI: http://qudt.org/vocab/quantitykind/DonorDensity
"Donor Density" is the number per volume of donor levels.
Applicable units are those of quantitykind:NumberDensity
quantitykind:DonorIonizationEnergy
URI: http://qudt.org/vocab/quantitykind/DonorIonizationEnergy
"Donor Ionization Energy" is the ionization energy of a donor.
Applicable units are those of quantitykind:Energy
quantitykind:DoseEquivalent
URI: http://qudt.org/vocab/quantitykind/DoseEquivalent
"Dose Equivalent" (former), or $\textit{Equivalent Absorbed Radiation Dose}$, usually shortened to $\textit{Equivalent Dose}$, is a computed average measure of the radiation absorbed by a fixed mass of biological tissue, that attempts to account for the different biological damage potential of different types of ionizing radiation. The equivalent dose to a tissue is found by multiplying the absorbed dose, in gray, by a dimensionless "quality factor" $Q$, dependent upon radiation type, and by another dimensionless factor $N$, dependent on all other pertinent factors. N depends upon the part of the body irradiated, the time and volume over which the dose was spread, even the species of the subject.
Applicable units are those of quantitykind:DoseEquivalent
quantitykind:DoseEquivalentQualityFactor
URI: http://qudt.org/vocab/quantitykind/DoseEquivalentQualityFactor
"Dose Equivalent Quality Factor" is a factor in the caculation and measurement of dose equivalent, by which the absorbed dose is to be weighted in order to account for different biological effectiveness of radiations, for radiation protection purposes.
Applicable units are those of quantitykind:DoseEquivalentQualityFactor
quantitykind:DoseEquivalentRate
URI: http://qudt.org/vocab/quantitykind/DoseEquivalentRate
quantitykind:DotsPerInch
URI: http://qudt.org/vocab/quantitykind/DotsPerInch
Applicable units are those of quantitykind:DotsPerInch
quantitykind:DragCoefficient
URI: http://qudt.org/vocab/quantitykind/DragCoefficient
In fluid dynamics, the drag coefficient is a dimensionless quantity that is used to quantify the drag or resistance of an object in a fluid environment such as air or water.
Applicable units are those of quantitykind:Dimensionless
quantitykind:DragForce
URI: http://qudt.org/vocab/quantitykind/DragForce
In fluid dynamics, drag refers to forces which act on a solid object in the direction of the relative fluid flow velocity. Unlike other resistive forces such as dry friction, which is nearly independent of velocity, drag forces depend on velocity. Drag forces always decrease fluid velocity relative to the solid object in the fluid's path.
Applicable units are those of quantitykind:Force
quantitykind:DryBulbTemperature
URI: http://qudt.org/vocab/quantitykind/DryBulbTemperature
The temperature of air measured by a thermometer freely exposed to the air, but shielded from radiation.
Applicable units are those of quantitykind:Temperature
quantitykind:DryVolume
URI: http://qudt.org/vocab/quantitykind/DryVolume
Dry measures are units of volume used to measure bulk commodities which are not gas or liquid. They are typically used in agriculture, agronomy, and commodity markets to measure grain, dried beans, and dried and fresh fruit; formerly also salt pork and fish. They are also used in fishing for clams, crabs, etc. and formerly for many other substances (for example coal, cement, lime) which were typically shipped and delivered in a standardized container such as a barrel. In the original metric system, the unit of dry volume was the stere, but this is not part of the modern metric system; the liter and the cubic meter ($m^{3}$) are now used. However, the stere is still widely used for firewood.
Applicable units are those of quantitykind:DryVolume
quantitykind:DutyCycle
URI: http://qudt.org/vocab/quantitykind/DutyCycle
A duty cycle or power cycle is the fraction of one period in which a signal or system is active.
Applicable units are those of quantitykind:DutyCycle
quantitykind:Duv
URI: http://qudt.org/vocab/quantitykind/Duv
Duv is a metric that is short for Delta u,v (not to be confused with Delta u',v') and describes the distance of a light color point from the black body curve.
Applicable units are those of quantitykind:Duv
quantitykind:DynamicFriction
URI: http://qudt.org/vocab/quantitykind/DynamicFriction
Kinetic (or dynamic) friction occurs when two objects are moving relative to each other and rub together (like a sled on the ground).
Applicable units are those of quantitykind:Force
quantitykind:DynamicFrictionCoefficient
URI: http://qudt.org/vocab/quantitykind/DynamicFrictionCoefficient
Kinetic (or dynamic) friction occurs when two objects are moving relative to each other and rub together (like a sled on the ground).
Applicable units are those of quantitykind:FrictionCoefficient
quantitykind:DynamicPressure
URI: http://qudt.org/vocab/quantitykind/DynamicPressure
Dynamic Pressure (indicated with q, or Q, and sometimes called velocity pressure) is the quantity defined by: $q = 1/2 * \rho v^{2}$, where (using SI units), $q$ is dynamic pressure in $pascals$, $\rho$ is fluid density in $kg/m^{3}$ (for example, density of air) and $v $ is fluid velocity in $m/s$.
Applicable units are those of quantitykind:ForcePerArea
quantitykind:DynamicViscosity
URI: http://qudt.org/vocab/quantitykind/DynamicViscosity
A measure of the molecular frictional resistance of a fluid as calculated using Newton's law.
Applicable units are those of quantitykind:DynamicViscosity
quantitykind:EarthClosestApproachVehicleVelocity
URI: http://qudt.org/vocab/quantitykind/EarthClosestApproachVehicleVelocity
Applicable units are those of quantitykind:Velocity
quantitykind:EarthquakeMagnitude
URI: http://qudt.org/vocab/quantitykind/EarthquakeMagnitude
Applicable units are those of quantitykind:EarthquakeMagnitude
quantitykind:EccentricityOfOrbit
URI: http://qudt.org/vocab/quantitykind/EccentricityOfOrbit
The orbital eccentricity of an astronomical object is a parameter that determines the amount by which its orbit around another body deviates from a perfect circle. In a two-body problem with inverse-square-law force, every orbit is a Kepler orbit. The eccentricity of this Kepler orbit is a positive number that defines its shape.
Applicable units are those of quantitykind:DimensionlessRatio
quantitykind:EffectiveExhaustVelocity
URI: http://qudt.org/vocab/quantitykind/EffectiveExhaustVelocity
The velocity of an exhaust stream after reduction by effects such as friction, non-axially directed flow, and pressure differences between the inside of the rocket and its surroundings. The effective exhaust velocity is one of two factors determining the thrust, or accelerating force, that a rocket can develop, the other factor being the quantity of reaction mass expelled from the rocket in unit time. In most cases, the effective exhaust velocity is close to the actual exhaust velocity.
Applicable units are those of quantitykind:Velocity
quantitykind:EffectiveMass
URI: http://qudt.org/vocab/quantitykind/EffectiveMass
"Effective Mass" is used in the motional equation for electrons in solid state bodies, depending on the wavenumber and corresponding to its velocity and energy level.
Applicable units are those of quantitykind:Mass
quantitykind:EffectiveMultiplicationFactor
URI: http://qudt.org/vocab/quantitykind/EffectiveMultiplicationFactor
The "Effective Multiplication Factor" is the multiplication factor for a finite medium.
Applicable units are those of quantitykind:MultiplicationFactor
quantitykind:Efficiency
URI: http://qudt.org/vocab/quantitykind/Efficiency
Efficiency is the ratio of output power to input power.
Applicable units are those of quantitykind:DimensionlessRatio
quantitykind:EinsteinCoefficients
URI: http://qudt.org/vocab/quantitykind/EinsteinCoefficients
Applicable units are those of quantitykind:EinsteinCoefficients
quantitykind:EinsteinTransitionProbability
URI: http://qudt.org/vocab/quantitykind/EinsteinTransitionProbability
Given two atomic states of energy $E_j$ and $E_k$. Let $E_j > E_k$. Assume the atom is bathed in radiation of energy density $u(w)$. Transitions between these states can take place in three different ways. Spontaneous, induced/stimulated emission, and induced absorption. $A_jk$ represents the Einstein transition probability for spontaneous emission.
Applicable units are those of quantitykind:EinsteinTransitionProbability
quantitykind:EinsteinTransitionProbabilityForSpontaneousOrInducedEmissionAndAbsorption
nuclear constant for the special transition where the probability of the absorption, spontaneous emission or induced emission of energy depends on the number of existing quantums of light, expressed as energy density in the wave model of light: energy divided by volume and frequency
quantitykind:ElectricCharge
URI: http://qudt.org/vocab/quantitykind/ElectricCharge
"Electric Charge" is a fundamental conserved property of some subatomic particles, which determines their electromagnetic interaction. Electrically charged matter is influenced by, and produces, electromagnetic fields. The electric charge on a body may be positive or negative. Two positively charged bodies experience a mutual repulsive force, as do two negatively charged bodies. A positively charged body and a negatively charged body experience an attractive force. Electric charge is carried by discrete particles and can be positive or negative. The sign convention is such that the elementary electric charge $e$, that is, the charge of the proton, is positive. The SI derived unit of electric charge is the coulomb.
Applicable units are those of quantitykind:ElectricCharge
quantitykind:ElectricChargeDensity
URI: http://qudt.org/vocab/quantitykind/ElectricChargeDensity
In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively.
Applicable units are those of quantitykind:ElectricChargeDensity
quantitykind:ElectricChargeLineDensity
URI: http://qudt.org/vocab/quantitykind/ElectricChargeLineDensity
In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively. The respective SI units are $C \cdot $, $m^{-1}$, $C \cdot m^{-2}$ or $C \cdot m^{-3}$.
Applicable units are those of quantitykind:ElectricChargeLineDensity
quantitykind:ElectricChargeLinearDensity
URI: http://qudt.org/vocab/quantitykind/ElectricChargeLinearDensity
In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively.
Applicable units are those of quantitykind:ElectricChargeLinearDensity
quantitykind:ElectricChargePerAmountOfSubstance
URI: http://qudt.org/vocab/quantitykind/ElectricChargePerAmountOfSubstance
"Electric Charge Per Amount Of Substance" is the charge assocated with a given amount of substance. Un the ISO and SI systems this is $1 mol$.
Applicable units are those of quantitykind:ElectricChargePerAmountOfSubstance
quantitykind:ElectricChargePerArea
URI: http://qudt.org/vocab/quantitykind/ElectricChargePerArea
In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively. The respective SI units are $C \cdot m^{-1}$, $C \cdot m^{-2}$ or $C \cdot m^{-3}$.
Applicable units are those of quantitykind:ElectricChargePerArea
quantitykind:ElectricChargePerMass
URI: http://qudt.org/vocab/quantitykind/ElectricChargePerMass
"Electric Charge Per Mass" is the charge associated with a specific mass of a substance. In the SI and ISO systems this is $1 kg$.
Applicable units are those of quantitykind:ElectricChargePerMass
quantitykind:ElectricChargeSurfaceDensity
URI: http://qudt.org/vocab/quantitykind/ElectricChargeSurfaceDensity
In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively.
Applicable units are those of quantitykind:ElectricChargeSurfaceDensity
quantitykind:ElectricChargeVolumeDensity
URI: http://qudt.org/vocab/quantitykind/ElectricChargeVolumeDensity
In electromagnetism, charge density is a measure of electric charge per unit volume of space, in one, two or three dimensions. More specifically: the linear, surface, or volume charge density is the amount of electric charge per unit length, surface area, or volume, respectively. The respective SI units are $C \cdot m^{-1}$, $C \cdot m^{-2}$ or $C \cdot m^{-3}$.
Applicable units are those of quantitykind:ElectricChargeVolumeDensity
quantitykind:ElectricConductivity
URI: http://qudt.org/vocab/quantitykind/ElectricConductivity
The quantity kind $\textit{Electric Conductivity}$ or $\textit{Specific Conductance}$ is a measure of a material's ability to conduct an electric current. When an electrical potential difference is placed across a conductor, its movable charges flow, giving rise to an electric current. The conductivity $\sigma$ is defined as the ratio of the electric current density $J$ to the electric field, $E$: $J = \sigma E$. In isotropic materials, conductivity is scalar-valued, however in general, conductivity is a tensor-valued quantity.
Applicable units are those of quantitykind:ElectricConductivity
quantitykind:ElectricCurrent
URI: http://qudt.org/vocab/quantitykind/ElectricCurrent
The quantity kind $\textit{Electric Current}$ is the flow (movement) of electric charge. The amount of electric current through some surface, for example, a section through a copper conductor, is defined as the amount of electric charge flowing through that surface over time. Current is a scalar-valued quantity. Electric current is one of the base quantities in the International System of Quantities, ISQ, on which the International System of Units, SI, is based.
Applicable units are those of quantitykind:ElectricCurrent
quantitykind:ElectricCurrentDensity
URI: http://qudt.org/vocab/quantitykind/ElectricCurrentDensity
"Electric Current Density" is a measure of the density of flow of electric charge; it is the electric current per unit area of cross section. Electric current density is a vector-valued quantity. Electric current, $I$, through a surface $S$ is defined as $I = \int_S J \cdot e_n dA$, where $e_ndA$ is the vector surface element.
Applicable units are those of quantitykind:ElectricCurrentDensity
quantitykind:ElectricCurrentPerAngle
URI: http://qudt.org/vocab/quantitykind/ElectricCurrentPerAngle
Applicable units are those of quantitykind:ElectricCurrentPerAngle
quantitykind:ElectricCurrentPerEnergy
URI: http://qudt.org/vocab/quantitykind/ElectricCurrentPerEnergy
Applicable units are those of quantitykind:ElectricCurrentPerEnergy
quantitykind:ElectricCurrentPerLength
URI: http://qudt.org/vocab/quantitykind/ElectricCurrentPerLength
Applicable units are those of quantitykind:LinearElectricCurrentDensity
quantitykind:ElectricCurrentPerTemperature
URI: http://qudt.org/vocab/quantitykind/ElectricCurrentPerTemperature
"Electric Current per Unit Temperature" is used to express how a current is subject to temperature. Originally used in Wien's Law to describe phenomena related to filaments. One use today is to express how a current generator derates with temperature.
Applicable units are those of quantitykind:ElectricCurrentPerTemperature
quantitykind:ElectricCurrentPhasor
URI: http://qudt.org/vocab/quantitykind/ElectricCurrentPhasor
"Electric Current Phasor" is a representation of current as a sinusoidal integral quantity using a complex quantity whose argument is equal to the initial phase and whose modulus is equal to the root-mean-square value. A phasor is a constant complex number, usually expressed in exponential form, representing the complex amplitude (magnitude and phase) of a sinusoidal function of time. Phasors are used by electrical engineers to simplify computations involving sinusoids, where they can often reduce a differential equation problem to an algebraic one.
Applicable units are those of quantitykind:ElectricCurrentPhasor
quantitykind:ElectricDipoleMoment
URI: http://qudt.org/vocab/quantitykind/ElectricDipoleMoment
"Electric Dipole Moment" is a measure of the separation of positive and negative electrical charges in a system of (discrete or continuous) charges. It is a vector-valued quantity. If the system of charges is neutral, that is if the sum of all charges is zero, then the dipole moment of the system is independent of the choice of a reference frame; however in a non-neutral system, such as the dipole moment of a single proton, a dependence on the choice of reference point arises. In such cases it is conventional to choose the reference point to be the center of mass of the system or the center of charge, not some arbitrary origin. This convention ensures that the dipole moment is an intrinsic property of the system. The electric dipole moment of a substance within a domain is the vector sum of electric dipole moments of all electric dipoles included in the domain.
Applicable units are those of quantitykind:ElectricDipoleMoment
quantitykind:ElectricDipoleMoment_CubicPerEnergy_Squared
URI: http://qudt.org/vocab/quantitykind/ElectricDipoleMoment_CubicPerEnergy_Squared
Applicable units are those of quantitykind:ElectricDipoleMoment_CubicPerEnergy_Squared
quantitykind:ElectricDipoleMoment_QuarticPerEnergy_Cubic
URI: http://qudt.org/vocab/quantitykind/ElectricDipoleMoment_QuarticPerEnergy_Cubic
Applicable units are those of quantitykind:ElectricDipoleMoment_QuarticPerEnergy_Cubic
quantitykind:ElectricDisplacement
URI: http://qudt.org/vocab/quantitykind/ElectricDisplacement
In a dielectric material the presence of an electric field E causes the bound charges in the material (atomic nuclei and their electrons) to slightly separate, inducing a local electric dipole moment. The Electric Displacement Field, $D$, is a vector field that accounts for the effects of free charges within such dielectric materials. This describes also the charge density on an extended surface that could be causing the field.
Applicable units are those of quantitykind:ElectricChargePerArea
quantitykind:ElectricDisplacementField
URI: http://qudt.org/vocab/quantitykind/ElectricDisplacementField
Applicable units are those of quantitykind:ElectricChargePerArea
quantitykind:ElectricField
URI: http://qudt.org/vocab/quantitykind/ElectricField
The space surrounding an electric charge or in the presence of a time-varying magnetic field has a property called an electric field. This electric field exerts a force on other electrically charged objects. In the idealized case, the force exerted between two point charges is inversely proportional to the square of the distance between them. (Coulomb's Law).
Applicable units are those of quantitykind:ElectricField
quantitykind:ElectricFieldStrength
URI: http://qudt.org/vocab/quantitykind/ElectricFieldStrength
$\textit{Electric Field Strength}$ is the magnitude and direction of an electric field, expressed by the value of $E$, also referred to as $\color{indigo} {\textit{electric field intensity}}$ or simply the electric field.
Applicable units are those of quantitykind:ElectricFieldStrength
quantitykind:ElectricFlux
URI: http://qudt.org/vocab/quantitykind/ElectricFlux
"Electric Flux" through an area is defined as the electric field multiplied by the area of the surface projected in a plane perpendicular to the field. Electric Flux is a scalar-valued quantity.
Applicable units are those of quantitykind:ElectricFlux
quantitykind:ElectricFluxDensity
URI: http://qudt.org/vocab/quantitykind/ElectricFluxDensity
$\textit{Electric Flux Density}$, also referred to as $\textit{Electric Displacement}$, is related to electric charge density by the following equation: $\text{div} \; D = \rho$, where $\text{div}$ denotes the divergence.
Applicable units are those of quantitykind:ElectricChargePerArea
quantitykind:ElectricPolarizability
URI: http://qudt.org/vocab/quantitykind/ElectricPolarizability
"Electric Polarizability" is the relative tendency of a charge distribution, like the electron cloud of an atom or molecule, to be distorted from its normal shape by an external electric field, which is applied typically by inserting the molecule in a charged parallel-plate capacitor, but may also be caused by the presence of a nearby ion or dipole.
Applicable units are those of quantitykind:ElectricPolarizability
quantitykind:ElectricPolarization
URI: http://qudt.org/vocab/quantitykind/ElectricPolarization
"Electric Polarization" is the relative shift of positive and negative electric charge in opposite directions within an insulator, or dielectric, induced by an external electric field. Polarization occurs when an electric field distorts the negative cloud of electrons around positive atomic nuclei in a direction opposite the field. This slight separation of charge makes one side of the atom somewhat positive and the opposite side somewhat negative. In some materials whose molecules are permanently polarized by chemical forces, such as water molecules, some of the polarization is caused by molecules rotating into the same alignment under the influence of the electric field. One of the measures of polarization is electric dipole moment, which equals the distance between the slightly shifted centres of positive and negative charge multiplied by the amount of one of the charges. Polarization P in its quantitative meaning is the amount of dipole moment p per unit volume V of a polarized material, P = p/V.
Applicable units are those of quantitykind:ElectricPolarization
quantitykind:ElectricPotential
URI: http://qudt.org/vocab/quantitykind/ElectricPotential
The Electric Potential is a scalar valued quantity associated with an electric field. The electric potential $\phi(x)$ at a point, $x$, is formally defined as the line integral of the electric field taken along a path from x to the point at infinity. If the electric field is static, that is time independent, then the choice of the path is arbitrary; however if the electric field is time dependent, taking the integral a different paths will produce different results.
Applicable units are those of quantitykind:ElectricPotential
quantitykind:ElectricPotentialDifference
URI: http://qudt.org/vocab/quantitykind/ElectricPotentialDifference
"Electric Potential Difference" is a scalar valued quantity associated with an electric field.
Applicable units are those of quantitykind:ElectricPotentialDifference
quantitykind:ElectricPower
URI: http://qudt.org/vocab/quantitykind/ElectricPower
"Electric Power" is the rate at which electrical energy is transferred by an electric circuit. In the simple case of direct current circuits, electric power can be calculated as the product of the potential difference in the circuit (V) and the amount of current flowing in the circuit (I): $P = VI$, where $P$ is the power, $V$ is the potential difference, and $I$ is the current. However, in general electric power is calculated by taking the integral of the vector cross-product of the electrical and magnetic fields over a specified area.
Applicable units are those of quantitykind:Power
quantitykind:ElectricPropulsionPropellantMass
URI: http://qudt.org/vocab/quantitykind/ElectricPropulsionPropellantMass
Applicable units are those of quantitykind:Mass
quantitykind:ElectricQuadrupoleMoment
URI: http://qudt.org/vocab/quantitykind/ElectricQuadrupoleMoment
The Electric Quadrupole Moment is a quantity which describes the effective shape of the ellipsoid of nuclear charge distribution. A non-zero quadrupole moment Q indicates that the charge distribution is not spherically symmetric. By convention, the value of Q is taken to be positive if the ellipsoid is prolate and negative if it is oblate. In general, the electric quadrupole moment is tensor-valued.
Applicable units are those of quantitykind:ElectricQuadrupoleMoment
quantitykind:ElectricSusceptibility
URI: http://qudt.org/vocab/quantitykind/ElectricSusceptibility
"Electric Susceptibility" is the ratio of electric polarization to electric field strength, normalized to the electric constant. The definition applies to an isotropic medium. For an anisotropic medium, electric susceptibility is a second order tensor.
Applicable units are those of quantitykind:ElectricSusceptibility
quantitykind:ElectricalConductance
URI: http://qudt.org/vocab/quantitykind/ElectricalConductance
measure of the capability of a material to conduct electric current, the value of which is defined as the reciprocal of the electrical resistance
Applicable units are those of quantitykind:ElectricalConductance
quantitykind:ElectricalPowerToMassRatio
URI: http://qudt.org/vocab/quantitykind/ElectricalPowerToMassRatio
Applicable units are those of quantitykind:SpecificPower
quantitykind:ElectricalResistance
URI: http://qudt.org/vocab/quantitykind/ElectricalResistance
different properties of materials which impede the electrical current in its movement when the free charged particles in these materials are set in motion by electrical fields and/or electrical potentials
Applicable units are those of quantitykind:ElectricalResistance
quantitykind:ElectrolyticConductivity
URI: http://qudt.org/vocab/quantitykind/ElectrolyticConductivity
"Electrolytic Conductivity" of an electrolyte solution is a measure of its ability to conduct electricity.
Applicable units are those of quantitykind:ElectrolyticConductivity
quantitykind:ElectromagneticEnergyDensity
URI: http://qudt.org/vocab/quantitykind/ElectromagneticEnergyDensity
$\textit{Electromagnetic Energy Density}$, also known as the $\color{indigo} {\text{Volumic Electromagnetic Energy}}$, is the energy associated with an electromagnetic field, per unit volume of the field.
Applicable units are those of quantitykind:ElectromagneticEnergyDensity
quantitykind:ElectromagneticPermeability
URI: http://qudt.org/vocab/quantitykind/ElectromagneticPermeability
$\textit{Permeability}$ is the degree of magnetization of a material that responds linearly to an applied magnetic field. In general permeability is a tensor-valued quantity. The definition given applies to an isotropic medium. For an anisotropic medium permeability is a second order tensor. In electromagnetism, permeability is the measure of the ability of a material to support the formation of a magnetic field within itself. In other words, it is the degree of magnetization that a material obtains in response to an applied magnetic field. Magnetic permeability is typically represented by the Greek letter $\mu$. The term was coined in September, 1885 by Oliver Heaviside. The reciprocal of magnetic permeability is $\textit{Magnetic Reluctivity}$.
Applicable units are those of quantitykind:ElectromagneticPermeability
quantitykind:ElectromagneticPermeabilityRatio
URI: http://qudt.org/vocab/quantitykind/ElectromagneticPermeabilityRatio
$\textit{Electromagnetic Permeability Ratio}$ is the ratio of the electromagnetic permeability of a specific medium to the electromagnetic permeability of free space.
Applicable units are those of quantitykind:ElectromagneticPermeabilityRatio
quantitykind:ElectromagneticWavePhaseSpeed
URI: http://qudt.org/vocab/quantitykind/ElectromagneticWavePhaseSpeed
$\textit{Electromagnetic Wave Phase Speed}$ is the ratio of angular velocity and wavenumber.
Applicable units are those of quantitykind:ElectromagneticWavePhaseSpeed
quantitykind:ElectromotiveForce
URI: http://qudt.org/vocab/quantitykind/ElectromotiveForce
In physics, $\textit{Electromotive Force}$, or most commonly $emf$ (seldom capitalized), or (occasionally) electromotance is that which tends to cause current (actual electrons and ions) to flow. More formally, $emf$ is the external work expended per unit of charge to produce an electric potential difference across two open-circuited terminals. $\textit{Electromotive Force}$ is deprecated in the ISO System of Quantities.
Applicable units are those of quantitykind:EnergyPerElectricCharge
quantitykind:ElectronAffinity
URI: http://qudt.org/vocab/quantitykind/ElectronAffinity
$\textit{Electron Affinity}$ is the energy difference between an electron at rest at infinity and an electron at the lowest level of the conduction band in an insulator or semiconductor. The amount of energy released when an electron is added to a neutral atom or molecule to form a negative ion.
Applicable units are those of quantitykind:Energy
quantitykind:ElectronDensity
URI: http://qudt.org/vocab/quantitykind/ElectronDensity
$\textit{Electron Density}$ is the number of electrons per volume in conduction bands. It is the measure of the probability of an electron being present at a specific location.
Applicable units are those of quantitykind:NumberDensity
quantitykind:ElectronMeanFreePath
URI: http://qudt.org/vocab/quantitykind/ElectronMeanFreePath
$\textit{Electron Mean Free Path}$ is the mean free path of electrons.
Applicable units are those of quantitykind:Length
quantitykind:ElectronMobility
URI: http://qudt.org/vocab/quantitykind/ElectronMobility
Applicable units are those of quantitykind:Mobility
quantitykind:ElectronRadius
URI: http://qudt.org/vocab/quantitykind/ElectronRadius
$\textit{Electron Radius}$, also known as the Lorentz radius or the Thomson scattering length, is based on a classical (i.e., non-quantum) relativistic model of the electron.
Applicable units are those of quantitykind:Length
quantitykind:ElevationRelativeToNAP
URI: http://qudt.org/vocab/quantitykind/ElevationRelativeToNAP
Height measurement relative to the Normaal Amsterdams Peil (NAP) (en: Amsterdam Ordnance System). Being a form of gravity related height
quantitykind:EllipticalOrbitApogeeVelocity
URI: http://qudt.org/vocab/quantitykind/EllipticalOrbitApogeeVelocity
Velocity at apogee for an elliptical orbit velocity
Applicable units are those of quantitykind:Velocity
quantitykind:EllipticalOrbitPerigeeVelocity
URI: http://qudt.org/vocab/quantitykind/EllipticalOrbitPerigeeVelocity
Velocity at apogee for an elliptical orbit velocity.
Applicable units are those of quantitykind:Velocity
quantitykind:Emissivity
URI: http://qudt.org/vocab/quantitykind/Emissivity
Emissivity of a material (usually written $\varepsilon$ or e) is the relative ability of its surface to emit energy by radiation.
Applicable units are those of quantitykind:Emissivity
quantitykind:Energy
URI: http://qudt.org/vocab/quantitykind/Energy
Energy is the quantity characterizing the ability of a system to do work.
Applicable units are those of quantitykind:Energy
quantitykind:EnergyContent
URI: http://qudt.org/vocab/quantitykind/EnergyContent
saved quantity of energy which can be used physically or chemically
Applicable units are those of quantitykind:Energy
quantitykind:EnergyDensity
URI: http://qudt.org/vocab/quantitykind/EnergyDensity
Energy density is defined as energy per unit volume. The SI unit for energy density is the joule per cubic meter.
Applicable units are those of quantitykind:EnergyDensity
quantitykind:EnergyDensityOfStates
URI: http://qudt.org/vocab/quantitykind/EnergyDensityOfStates
"Energy Density of States" refers to electrons or other entities, e.g. phonons. It can, for example, refer to amount of substance instead of volume.
Applicable units are those of quantitykind:EnergyDensityOfStates
quantitykind:EnergyExpenditure
URI: http://qudt.org/vocab/quantitykind/EnergyExpenditure
Energy expenditure is dependent on a person's sex, metabolic rate, body-mass composition, the thermic effects of food, and activity level. The approximate energy expenditure of a man lying in bed is $1.0\,kilo\,calorie\,per\,hour\,per\,kilogram$. For slow walking (just over two miles per hour), $3.0\,kilo\,calorie\,per\,hour\,per\,kilogram$. For fast steady running (about 10 miles per hour), $16.3\,kilo\,calorie\,per\,hour\,per\,kilogram$. Females expend about 10 per cent less energy than males of the same size doing a comparable activity. For people weighing the same, individuals with a high percentage of body fat usually expend less energy than lean people, because fat is not as metabolically active as muscle.
quantitykind:EnergyFluence
URI: http://qudt.org/vocab/quantitykind/EnergyFluence
"Energy Fluence" can be used to describe the energy delivered per unit area
Applicable units are those of quantitykind:EnergyFluence
quantitykind:EnergyFluenceRate
URI: http://qudt.org/vocab/quantitykind/EnergyFluenceRate
"Energy Fluence Rate" can be used to describe the energy fluence delivered per unit time.
Applicable units are those of quantitykind:PowerPerArea
quantitykind:EnergyImparted
URI: http://qudt.org/vocab/quantitykind/EnergyImparted
The "Energy Imparted", is a physical quantity associated with the energy delivered to a particular volume of matter by all the directly and indirectly ionizing particles (i.e. charged and uncharged) entering that volume.
Applicable units are those of quantitykind:Energy
quantitykind:EnergyInternal
URI: http://qudt.org/vocab/quantitykind/EnergyInternal
The internal energy is the total energy contained by a thermodynamic system. It is the energy needed to create the system, but excludes the energy to displace the system's surroundings, any energy associated with a move as a whole, or due to external force fields. Internal energy has two major components, kinetic energy and potential energy. The internal energy (U) is the sum of all forms of energy (Ei) intrinsic to a thermodynamic system: $ U = \sum_i E_i $
Applicable units are those of quantitykind:Energy
quantitykind:EnergyKinetic
URI: http://qudt.org/vocab/quantitykind/EnergyKinetic
The kinetic energy of an object is the energy which it possesses due to its motion. It is defined as the work needed to accelerate a body of a given mass from rest to its stated velocity.
Applicable units are those of quantitykind:Energy
quantitykind:EnergyLevel
URI: http://qudt.org/vocab/quantitykind/EnergyLevel
"Energy Level" is the ionization energy for an electron at the Fermi energy in the interior of a substance.
Applicable units are those of quantitykind:Energy
quantitykind:EnergyPerArea
URI: http://qudt.org/vocab/quantitykind/EnergyPerArea
Energy per unit area is a measure of the energy either impinging upon or generated from a given unit of area. This can be a measure of the "toughness" of a material, being the amount of energy that needs to be applied per unit area of a crack to cause it to fracture. This is a constant for a given material..
Applicable units are those of quantitykind:EnergyPerArea