QUDT Units Version 2.1.47
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Latest published version: http://www.QUDT.org/doc/2025/01/DOC_VOCAB-UNITS-ALL.html
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Abstract
Table of Contents
Imported Graphs
A list of graphs imported by http://qudt.org/2.1/vocab/unit is shown below.
| Graph URI | Intent |
|---|---|
| http://qudt.org/2.1/schema/facade/qudt | |
| http://qudt.org/2.1/vocab/prefix | Provides a vocabulary of prefixes for both human and machine use |
| http://qudt.org/2.1/vocab/quantitykind | Provides a vocabulary of all quantity kinds. |
| http://qudt.org/2.1/vocab/sou | The intent of this graph is the specification of all Systems of Units |
Non-imported Resources
The graph uses 5 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/unit/ with the prefix unit.
Classes
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Properties
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Instances
The graph defines, or extends, 2572 instances, as indexed below:
Restricted Datatypes
No restricted datatypes defined in this graph
unit:A
URI: http://qudt.org/vocab/unit/A
$\textit{Ampere}$, often shortened to $\text{amp}$, is the SI unit of electric current and is one of the seven SI base units defined as: $$\text{A} \equiv \frac{\textit{C}}{\textit{s}} \equiv \frac{\textit{coulomb}}{\textit{second}} \equiv \frac{\text{joule}}{\text{weber}}$$ Note that SI supports only the use of symbols and deprecates the use of any abbreviations for units.
unit:A-HR
URI: http://qudt.org/vocab/unit/A-HR
$\textit{Ampere Hour}$ is a practical unit of electric charge equal to the charge flowing in one hour through a conductor passing one ampere. An ampere-hour or amp-hour (symbol $Ah,\,AHr,\, A \cdot h, A h$) is a unit of electric charge, with sub-units milliampere-hour ($mAh$) and milliampere second ($mAs$). One ampere-hour is equal to 3600 coulombs (ampere-seconds), the electric charge transferred by a steady current of one ampere for one hour. The ampere-hour is frequently used in measurements of electrochemical systems such as electroplating and electrical batteries. The commonly seen milliampere-hour ($mAh$ or $mA \cdot h$) is one-thousandth of an ampere-hour ($3.6 \,coulombs$).
unit:A-HR-PER-DEG_C
URI: http://qudt.org/vocab/unit/A-HR-PER-DEG_C
$\textit{Ampere Hour per Degree Celsius}$ is the product of the SI base unit ampere and the unit hour divided by the unit degree Celsius.
unit:A-HR-PER-DeciM3
URI: http://qudt.org/vocab/unit/A-HR-PER-DeciM3
$\textit{Ampere Hour per Cubic Decimetre}$ is the product of the SI base unit ampere and the unit hour divided by 0.001-fold of the power of the SI base unit metre with the exponent 3.
unit:A-HR-PER-KiloGM
URI: http://qudt.org/vocab/unit/A-HR-PER-KiloGM
product of the SI base unit ampere and the unit hour divided by the SI base unit kilogram
unit:A-HR-PER-M2
URI: http://qudt.org/vocab/unit/A-HR-PER-M2
product of the SI base unit ampere and the unit hour divided by the power of the SI base unit metre with the exponent 2
unit:A-HR-PER-M3
URI: http://qudt.org/vocab/unit/A-HR-PER-M3
product of the SI base unit ampere and the unit hour divided by the power of the SI base unit metre with the exponent 3
unit:A-M2
URI: http://qudt.org/vocab/unit/A-M2
The SI unit of electromagnetic moment.
unit:A-M2-PER-J-SEC
URI: http://qudt.org/vocab/unit/A-M2-PER-J-SEC
The SI unit of gyromagnetic ratio.
unit:A-MIN
URI: http://qudt.org/vocab/unit/A-MIN
product of the SI base unit ampere and the unit minute
unit:A-PER-A-HR
URI: http://qudt.org/vocab/unit/A-PER-A-HR
SI base unit ampere divided by the SI base unit ampere and the unit hour
unit:A-PER-CentiM
URI: http://qudt.org/vocab/unit/A-PER-CentiM
SI base unit ampere divided by the 0.01-fold of the SI base unit metre
unit:A-PER-CentiM2
URI: http://qudt.org/vocab/unit/A-PER-CentiM2
SI base unit ampere divided by the 0.0001-fold of the power of the SI base unit metre by exponent 2
unit:A-PER-DEG_C
URI: http://qudt.org/vocab/unit/A-PER-DEG_C
A measure 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.
unit:A-PER-GM
URI: http://qudt.org/vocab/unit/A-PER-GM
$\textit{Ampere per gram}$ is a practical unit to describe an (applied) current relative to the involved amount of material. This unit is often found in electrochemistry to standardize test conditions and compare various scales of investigated materials.
unit:A-PER-J
URI: http://qudt.org/vocab/unit/A-PER-J
$\textit{Ampere per Joule}$ is the inverse measure of $joule-per-ampere$ or $weber$. The measure for the reciprical of magnetic flux.
unit:A-PER-K
URI: http://qudt.org/vocab/unit/A-PER-K
SI base unit ampere divided by the SI base unit kelvin
unit:A-PER-KiloGM
URI: http://qudt.org/vocab/unit/A-PER-KiloGM
SI base unit ampere divided by the SI base unit kilogram
unit:A-PER-M
URI: http://qudt.org/vocab/unit/A-PER-M
is the SI unit of magnetic field strength. One ampere per meter is equal to $\pi/250$ oersteds ($12.566\, 371\,millioersteds$) in CGS units. The ampere per meter is also the SI unit of "magnetization" in the sense of magnetic dipole moment per unit volume; in this context $1 A/m = 0.001\,emu\,per\,cubic\,centimeter$.
unit:A-PER-M2
URI: http://qudt.org/vocab/unit/A-PER-M2
$\textit{Ampere Per Square Meter}$ is a unit in the category of electric current density. This unit is commonly used in the SI unit system.
unit:A-PER-MilliM
URI: http://qudt.org/vocab/unit/A-PER-MilliM
SI base unit ampere divided by the 0.001-fold of the SI base unit metre
unit:A-PER-MilliM2
URI: http://qudt.org/vocab/unit/A-PER-MilliM2
SI base unit ampere divided by the 0.000 001-fold of the power of the SI base unit metre by exponent 2
unit:A-PER-PA
URI: http://qudt.org/vocab/unit/A-PER-PA
SI base unit ampere divided by the SI derived unit pascal
unit:A-PER-RAD
URI: http://qudt.org/vocab/unit/A-PER-RAD
$\textit{Ampere per Radian}$ is a derived unit for measuring the amount of current per unit measure of angle, expressed in ampere per radian.
unit:A-SEC
URI: http://qudt.org/vocab/unit/A-SEC
product out of the SI base unit ampere and the SI base unit second
unit:A-SEC2
URI: http://qudt.org/vocab/unit/A-SEC2
product out of the power of the SI base unit ampere and the SI base unit second with the exponent 2
unit:A2-SEC
URI: http://qudt.org/vocab/unit/A2-SEC
product out of the power of the SI base unit ampere with the exponent 2 and the SI base unit second
unit:AC
URI: http://qudt.org/vocab/unit/AC
The acre is a unit of area in a number of different systems, including the imperial and U.S. customary systems. Its international symbol is ac. The most commonly used acres today are the international acre and, in the United States, the survey acre. The most common use of the acre is to measure tracts of land. One international acre is equal to 4046.8564224 square metres.
unit:AC-FT
URI: http://qudt.org/vocab/unit/AC-FT
An acre-foot is a unit of volume commonly used in the United States in reference to large-scale water resources, such as reservoirs, aqueducts, canals, sewer flow capacity, and river flows. It is defined by the volume of one acre of surface area to a depth of one foot. Since the acre is defined as a chain by a furlong ($66 ft \times 660 ft$) the acre-foot is exactly $43,560 cubic feet$. For irrigation water, the volume of $1 ft \times 1 \; ac = 43,560 \; ft^{3} (1,233.482 \; m^{3}, 325,851 \; US gal)$.
unit:AC-FT_US
URI: http://qudt.org/vocab/unit/AC-FT_US
unit of the volume, which is used in the United States to measure/gauge the capacity of reservoirs
unit:AMU
URI: http://qudt.org/vocab/unit/AMU
The $\textit{Unified Atomic Mass Unit}$ (symbol: $\mu$) or $\textit{dalton}$ (symbol: Da) is a unit that is used for indicating mass on an atomic or molecular scale. It is defined as one twelfth of the rest mass of an unbound atom of carbon-12 in its nuclear and electronic ground state, and has a value of $1.660538782(83) \times 10^{-27} kg$. One $Da$ is approximately equal to the mass of one proton or one neutron. The CIPM have categorised it as a $\textit{"non-SI unit whose values in SI units must be obtained experimentally"}$.
unit:ANGSTROM
URI: http://qudt.org/vocab/unit/ANGSTROM
The $Angstr\ddot{o}m$ is an internationally recognized unit of length equal to $0.1 \,nanometre$ or $1 \times 10^{-10}\,metres$. Although accepted for use, it is not formally defined within the International System of Units(SI). The angstrom is often used in the natural sciences to express the sizes of atoms, lengths of chemical bonds and the wavelengths of electromagnetic radiation, and in technology for the dimensions of parts of integrated circuits. It is also commonly used in structural biology.
unit:ANGSTROM3
URI: http://qudt.org/vocab/unit/ANGSTROM3
A unit that is a non-SI unit, specifically a CGS unit, of polarizability known informally as polarizability volume. The SI defined units for polarizability are C*m^2/V and can be converted to $Angstr\ddot{o}m$^3 by multiplying the SI value by 4 times pi times the vacuum permittivity and then converting the resulting m^3 to $Angstr\ddot{o}m$^3 through the SI base 10 conversion (multiplying by 10^-30).
unit:ARCMIN
URI: http://qudt.org/vocab/unit/ARCMIN
A minute of arc, arcminute, or minute arc (MOA), is a unit of angular measurement equal to one sixtieth (1/60) of one degree (circle/21,600), or $\pi /10,800 radians$. In turn, a second of arc or arcsecond is one sixtieth (1/60) of one minute of arc. Since one degree is defined as one three hundred and sixtieth (1/360) of a rotation, one minute of arc is 1/21,600 of a rotation.
unit:ARCSEC
URI: http://qudt.org/vocab/unit/ARCSEC
"Arc Second" is a unit of angular measure, also called the $\textit{second of arc}$, equal to $1/60 \; arcminute$. One arcsecond is a very small angle: there are 1,296,000 in a circle. The SI recommends $\textit{double prime}$ ($''$) as the symbol for the arcsecond. The symbol has become common in astronomy, where very small angles are stated in milliarcseconds ($mas$).
unit:ARE
URI: http://qudt.org/vocab/unit/ARE
An 'are' is a unit of area equal to 0.02471 acre and 100 centare.
unit:AT
URI: http://qudt.org/vocab/unit/AT
The $\textit{ampere-turn}$ was the MKS unit of magnetomotive force (MMF), represented by a direct current of one ampere flowing in a single-turn loop in a vacuum. "Turns" refers to the winding number of an electrical conductor comprising an inductor. The ampere-turn was replaced by the SI unit, $ampere$.
unit:AT-PER-IN
URI: http://qudt.org/vocab/unit/AT-PER-IN
The $\textit{Ampere Turn per Inch}$ is a measure of magnetic field intensity and is equal to 12.5664 Oersted.
unit:AT-PER-M
URI: http://qudt.org/vocab/unit/AT-PER-M
The $\textit{Ampere Turn per Metre}$ is the SI unit of magnetic field strength. One ampere per meter is equal to $\pi/250$ oersteds (12.566 371 millioersteds) in CGS units. The ampere per meter is also the SI unit of "magnetization" in the sense of magnetic dipole moment per unit volume; in this context $1 A/m = 0.001 emu per cubic centimeter$.
unit:ATM
URI: http://qudt.org/vocab/unit/ATM
The unit for $\textit{Standard Atmosphere}$, symbol: $atm$, is an international reference pressure defined as $101.325 \,kPa$ and formerly used as unit of pressure. For practical purposes it has been replaced by the bar which is $100 kPa$. The difference of about 1% is not significant for many applications, and is within the error range of common pressure gauges.
unit:ATM-M3-PER-MOL
URI: http://qudt.org/vocab/unit/ATM-M3-PER-MOL
The unit $\textit{Atmosphere Cubic Metre per Mole}$ consists of the power of the SI base unit metre with the exponent 3 multiplied by the unit atmosphere divided by the SI base unit mol.
unit:ATM-PER-M
URI: http://qudt.org/vocab/unit/ATM-PER-M
An [outdated] unit of the pressure divided by the SI base unit metre
unit:ATM_T
URI: http://qudt.org/vocab/unit/ATM_T
The unit for $\textit{Technical Atmosphere}$, symbol: $at$, is a non-SI unit of pressure equal to one kilogram-force per square centimeter. The symbol $at$ clashes with that of the katal (symbol: $kat$), the SI unit of catalytic activity; a kilotechnical atmosphere would have the symbol $kat$, indistinguishable from the symbol for katal. It also clashes with that of the non-SI unit, the $attotonne$, but that unit would be more likely be rendered as the equivalent SI unit. Assay ton (abbreviation $AT$) is not a unit of measurement, but a standard quantity used in assaying ores of precious metals; it is $29 1D6 \,grams$ (short assay ton) or $32 2D3 \,grams$ (long assay ton), the amount which bears the same ratio to a milligram as a short or long ton bears to a troy ounce. In other words, the number of milligrams of a particular metal found in a sample of this size gives the number of troy ounces contained in a short or long ton of ore.
unit:ATM_T-PER-M
URI: http://qudt.org/vocab/unit/ATM_T-PER-M
The unit $\textit{technical atmosphere per metre}$ is the pressure which is generated by a 10 metre water column divided by the SI base unit metre.
unit:AU
URI: http://qudt.org/vocab/unit/AU
An $\textit{astronomical unit}$, abbreviated as $AU$, $au$, $a.u.$, or $ua$ is a unit of length equal to $149,597,870,700\, metres$ ($92,955,807.273\, mi$) or approximately the mean Earth Sun distance.
unit:AWG
URI: http://qudt.org/vocab/unit/AWG
The unit for $\textit{American Wire Gage}$, symbol $AWG$, is for the standard nominal diameters and cross-sectional areas of American Wire Gage sizes of solid round wires used as electrical conductors.
unit:A_Ab
URI: http://qudt.org/vocab/unit/A_Ab
The $\textit{Abampere (aA)}$, also called the $biot$ after Jean-Baptiste Biot, is the basic electromagnetic unit of electric current in the emu-cgs system of units (electromagnetic cgs). One $abampere$ is equal to ten amperes in the SI system of units. An $abampere$ is the constant current that produces, when maintained in two parallel conductors of negligible circular section and of infinite length placed 1 centimetre apart, a force of 2 dynes per centimetre between the two conductors.
unit:A_Ab-CentiM2
URI: http://qudt.org/vocab/unit/A_Ab-CentiM2
The unit $\textit{Abampere Square Centimeter}$ is the unit of magnetic moment in the electromagnetic centimeter-gram-second system.
unit:A_Ab-PER-CentiM2
URI: http://qudt.org/vocab/unit/A_Ab-PER-CentiM2
The unit $\textit{Abampere Per Square Centimeter}$, symbol $aA/cm^2$, is a unit in the category of Electric current density. It is also known as $\textit{abamperes per square centimeter}$, $\textit{abampere/square centimeter}$, and $\textit{abampere per square centimetre}$. This unit is commonly used in the cgs unit system. $\textit{Abampere Per Square Centimeter}$ has a dimension of $L^{-2}I$ where $L$ is length, and $I$ is electric current. It can be converted to the corresponding standard SI unit $A/m^{2}$ by multiplying its value by a factor of 100000.
unit:A_Stat
URI: http://qudt.org/vocab/unit/A_Stat
The unit $\textit{Statampere}$, symbol $statA$ is a unit in the category of Electric current. It is also known as statamperes. This unit is commonly used in the cgs unit system. $\textit{Statampere (statA)}$ has a dimension of $I$ where $I$ is electric current. It can be converted to the corresponding standard SI unit $A$ by multiplying its value by a factor of 3.355641E-010.
unit:A_Stat-PER-CentiM2
URI: http://qudt.org/vocab/unit/A_Stat-PER-CentiM2
The $\textit{Statampere per Square Centimeter}$ is a unit of electric current density in the c.g.s. system of units.
unit:AttoA
URI: http://qudt.org/vocab/unit/AttoA
An $\textit{AttoAmpere}$ is 0.000000000000000001-fold of the unit ampere
unit:AttoC
URI: http://qudt.org/vocab/unit/AttoC
An $\textit{AttoColomb}$ is $10^{-18} C$, where $C$ is the unit for $Colomb$.
unit:AttoFARAD
URI: http://qudt.org/vocab/unit/AttoFARAD
The $\textit{AttoFarad}$ is 0,000 000 000 000 000 001-fold of the SI derived unit $farad$.
unit:AttoJ
URI: http://qudt.org/vocab/unit/AttoJ
The $\textit{AttoJoule}$ is 0,000 000 000 000 000 001-fold of the derived SI unit $joule$.
unit:AttoJ-SEC
URI: http://qudt.org/vocab/unit/AttoJ-SEC
The $\textit{AttoJoule Second}$ is the unit for the Planck's constant as product of the SI derived unit joule and the SI base unit second.
unit:AttoSEC
URI: http://qudt.org/vocab/unit/AttoSEC
An $\textit{AttoSecond}$ is 0.000000000000000001-fold of the SI base unit $second$.
unit:B
URI: http://qudt.org/vocab/unit/B
The $\textit{Bel}$ is a logarithmic unit of sound pressure equal to 10 decibels (dB). It is defined as: $1 B = (1/2) \log_{10}(Np)$
unit:B-PER-M
URI: http://qudt.org/vocab/unit/B-PER-M
The $\textit{Bel}$ is the unit $\textit{Bel}$ divided by the SI base unit metre/
unit:BAN
URI: http://qudt.org/vocab/unit/BAN
A $\textit{ban}$ is a logarithmic unit which measures information or entropy, based on base 10 logarithms and powers of 10, rather than the powers of 2 and base 2 logarithms which define the bit. One $\textit{ban}$ is approximately $3.32 (log_2 10) bits$.
unit:BAR
URI: http://qudt.org/vocab/unit/BAR
The $\textit{bar}$ is a non-SI unit of pressure, defined by the IUPAC as exactly equal to $100,000\,Pa$. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to $100,000\,Pa = 1 \,bar \approx 750.0616827\, Torr$. Units derived from the bar are the megabar (symbol: $Mbar$), kilobar (symbol: $kbar$), decibar (symbol: $dbar$), centibar (symbol: $cbar$), and millibar (symbol: $mbar$ or $mb$). They are not SI or cgs units, but they are accepted for use with the SI.
unit:BAR-L-PER-SEC
URI: http://qudt.org/vocab/unit/BAR-L-PER-SEC
The unit $\textit{Bar Litre Per Second}$ is the product of the unit $bar$ and the unit $litre$ divided by the SI base unit for second.
unit:BAR-M3-PER-SEC
URI: http://qudt.org/vocab/unit/BAR-M3-PER-SEC
product out of the 0.001-fold of the unit bar and the power of the SI base unit metre with the exponent 3 divided by the SI base unit second
unit:BAR-PER-BAR
URI: http://qudt.org/vocab/unit/BAR-PER-BAR
pressure relation consisting of the unit bar divided by the unit bar
unit:BAR-PER-DEG_C
URI: http://qudt.org/vocab/unit/BAR-PER-DEG_C
unit bar divided by the unit °Celsius
unit:BAR-PER-K
URI: http://qudt.org/vocab/unit/BAR-PER-K
unit with the name bar divided by the SI base unit kelvin
unit:BARAD
URI: http://qudt.org/vocab/unit/BARAD
A barad is a dyne per square centimetre ($dyn \cdot cm^{-2}$), and is equal to $0.1 Pa $ ($1 \, micro \, bar$, $0.000014504 \, p.s.i.$). Note that this is precisely the microbar, the confusable bar being related in size to the normal atmospheric pressure, at $100\,dyn \cdot cm^{-2}$. Accordingly barad was not abbreviated, so occurs prefixed as in $cbarad = centibarad$. Despite being the coherent unit for pressure in c.g.s., barad was probably much less common than the non-coherent bar. Barad is sometimes called $barye$, a name also used for $bar$.
unit:BARN
URI: http://qudt.org/vocab/unit/BARN
A barn (symbol b) is a unit of area. Originally used in nuclear physics for expressing the cross sectional area of nuclei and nuclear reactions, today it is used in all fields of high energy physics to express the cross sections of any scattering process, and is best understood as a measure of the probability of interaction between small particles. A barn is defined as $10^{-28} m^2 (100 fm^2)$ and is approximately the cross sectional area of a uranium nucleus. The barn is also the unit of area used in nuclear quadrupole resonance and nuclear magnetic resonance to quantify the interaction of a nucleus with an electric field gradient. While the barn is not an SI unit, it is accepted for use with the SI due to its continued use in particle physics.
unit:BARN-PER-EV
URI: http://qudt.org/vocab/unit/BARN-PER-EV
unit for the representation of the cross section barn divided by the unit of the energy electronvolt which is used for the atomic physics, nuclear physics and particle physics
unit:BARN-PER-SR
URI: http://qudt.org/vocab/unit/BARN-PER-SR
unit for the representation of the cross section barn divided by the unit of the solid angle steradian
unit:BARN-PER-SR-EV
URI: http://qudt.org/vocab/unit/BARN-PER-SR-EV
unit for the representation of the cross section barn divided by the product of the unit of the solid angle steradian and the unit of the energy electronvolt which is used for the atomic physics, nuclear physics and particle physics
unit:BARYE
URI: http://qudt.org/vocab/unit/BARYE
The barye, or sometimes barad, barrie, bary, baryd, baryed, or barie, is the centimetre-gram-second (CGS) unit of pressure. It is equal to 1 dyne per square centimetre.
unit:BAUD
URI: http://qudt.org/vocab/unit/BAUD
unit for the symbol rate in communications engineering and telecommunication, at which 1 baud corresponds to the speed, at which 1 symbol (defined measurable signal change in the physical exchange medium) will be exchanged per second
unit:BBL
URI: http://qudt.org/vocab/unit/BBL
A barrel is one of several units of volume, with dry barrels, fluid barrels (UK beer barrel, U.S. beer barrel), oil barrel, etc. The volume of some barrel units is double others, with various volumes in the range of about 100-200 litres (22-44 imp gal; 26-53 US gal).
unit:BBL_UK_PET
URI: http://qudt.org/vocab/unit/BBL_UK_PET
unit of the volume for crude oil according to the Imperial system of units
unit:BBL_UK_PET-PER-DAY
URI: http://qudt.org/vocab/unit/BBL_UK_PET-PER-DAY
unit of the volume barrel (UK petroleum) for crude oil according to the Imperial system of units divided by the unit day
unit:BBL_UK_PET-PER-HR
URI: http://qudt.org/vocab/unit/BBL_UK_PET-PER-HR
unit of the volume barrel (UK petroleum) for crude oil according to the Imperial system of units divided by the unit hour
unit:BBL_UK_PET-PER-MIN
URI: http://qudt.org/vocab/unit/BBL_UK_PET-PER-MIN
unit of the volume barrel (UK petroleum) for crude oil according to the Imperial system of units divided by the unit minute
unit:BBL_UK_PET-PER-SEC
URI: http://qudt.org/vocab/unit/BBL_UK_PET-PER-SEC
unit of the volume barrel (UK petroleum) for crude oil according to the Imperial system of units divided by the SI base unit second
unit:BBL_US
URI: http://qudt.org/vocab/unit/BBL_US
unit of the volume for crude oil according to the Anglo-American system of units
unit:BBL_US-PER-DAY
URI: http://qudt.org/vocab/unit/BBL_US-PER-DAY
unit of the volume barrel (US petroleum) for crude oil according to the Anglo-American system of units divided by the unit day
unit:BBL_US-PER-MIN
URI: http://qudt.org/vocab/unit/BBL_US-PER-MIN
unit of the volume barrel (US petroleum) for crude oil according to the Anglo-American system of units divided by the unit minute
unit:BBL_US_DRY
URI: http://qudt.org/vocab/unit/BBL_US_DRY
non SI-conform unit of the volume in the USA which applies to a resolution from 1912: 1 dry barrel (US) equals approximately to 115.63 litre
unit:BBL_US_PET-PER-HR
URI: http://qudt.org/vocab/unit/BBL_US_PET-PER-HR
unit of the volume barrel (US petroleum) for crude oil according to the Anglo-American system of units divided by the unit hour
unit:BBL_US_PET-PER-SEC
URI: http://qudt.org/vocab/unit/BBL_US_PET-PER-SEC
unit of the volume barrel (US petroleum) for crude oil according to the Anglo-American system of units divided by the SI base unit second
unit:BEAT-PER-MIN
URI: http://qudt.org/vocab/unit/BEAT-PER-MIN
"Heart Beat per Minute" is a unit for 'Heart Rate' expressed as $BPM$.
unit:BFT
URI: http://qudt.org/vocab/unit/BFT
unit for classification of winds according to their speed, developed by Sir Francis Beaufort as measure for the over-all behaviour of a ship's sail at different wind speeds
unit:BIOT
URI: http://qudt.org/vocab/unit/BIOT
"Biot" is another name for the abampere (aA), which is the basic electromagnetic unit of electric current in the emu-cgs (centimeter-gram-second) system of units. It is called after a French physicist, astronomer, and mathematician Jean-Baptiste Biot. One abampere is equal to ten amperes in the SI system of units. One abampere is the current, which produces a force of 2 dyne/cm between two infinitively long parallel wires that are 1 cm apart.
unit:BIT
URI: http://qudt.org/vocab/unit/BIT
In information theory, a bit is the amount of information that, on average, can be stored in a discrete bit. It is thus the amount of information carried by a choice between two equally likely outcomes. One bit corresponds to about 0.693 nats (ln(2)), or 0.301 hartleys (log10(2)).
unit:BIT-PER-M
URI: http://qudt.org/vocab/unit/BIT-PER-M
unit bit divided by the SI base unit metre
unit:BIT-PER-M2
URI: http://qudt.org/vocab/unit/BIT-PER-M2
unit bit divided by the power of the SI base unit metre with the exponent 2
unit:BIT-PER-M3
URI: http://qudt.org/vocab/unit/BIT-PER-M3
unit bit divided by the power of the SI base unit metre with the exponent 3
unit:BIT-PER-SEC
URI: http://qudt.org/vocab/unit/BIT-PER-SEC
A bit per second (B/s) is a unit of data transfer rate equal to 1 bits per second.
unit:BQ
URI: http://qudt.org/vocab/unit/BQ
The $\textit{Becquerel}$ is the SI derived unit of activity, usually meaning radioactivity. Radioactivity is caused when atoms disintegrate, ejecting energetic particles. One becquerel is the radiation caused by one disintegration per second; this is equivalent to about $27.0270 \text{picocuries (pCi)}$. The unit is named for a French physicist, Antoine-Henri Becquerel (1852-1908), the discoverer of radioactivity. Note: both the becquerel and the hertz are basically defined as one event per second, yet they measure different things. The hertz is used to measure the rates of events that happen periodically in a fixed and definite cycle. The becquerel is used to measure the rates of events that happen sporadically and unpredictably, not in a definite cycle.
unit:BQ-PER-KiloGM
URI: http://qudt.org/vocab/unit/BQ-PER-KiloGM
The only unit in the category of Specific radioactivity. It is also known as becquerels per kilogram, becquerel/kilogram. This unit is commonly used in the SI unit system. Becquerel Per Kilogram (Bq/kg) has a dimension of $M{-1}T{-1}$ where $M$ is mass, and $T$ is time. It essentially the same as the corresponding standard SI unit $/kg/s$.
unit:BQ-PER-L
URI: http://qudt.org/vocab/unit/BQ-PER-L
One radioactive disintegration per second from a one part in 10**3 of the SI unit of volume (cubic metre).
unit:BQ-PER-M3
URI: http://qudt.org/vocab/unit/BQ-PER-M3
Becquerel Per Cubic Meter ($Bq/m3$) is a unit in the category of Radioactivity concentration. It is also known as becquerels per cubic meter, becquerel per cubic metre, becquerels per cubic metre, becquerel/cubic inch. This unit is commonly used in the SI unit system. Becquerel Per Cubic Meter (Bq/m3) has a dimension of $L{-3}T{-1}$ where $L$ is length, and $T$ is time. It essentially the same as the corresponding standard SI unit $/s\cdot m{3}$.
unit:BREATH-PER-MIN
URI: http://qudt.org/vocab/unit/BREATH-PER-MIN
A unit of respiratory rate.
unit:BREWSTER
URI: http://qudt.org/vocab/unit/BREWSTER
The brewster (B) is a non-SI unit used to measure the susceptibility of a material to photoelasticity, or the value of the stress-optic coefficient of the material. The unit has dimensions reciprocal to those of stress. One brewster is defined to be equal to 10^-12 square metres per newton (m^2/N or 1/Pa) or 10^-13 square centimetres per dyne (cm^2/dyn). The unit is named after David Brewster, who discovered stress-induced birefringence in 1816.
unit:BTU_39DEG_F
URI: http://qudt.org/vocab/unit/BTU_39DEG_F
unit of heat energy according to the Imperial system of units in a reference temperature of 39 °F
unit:BTU_59DEG_F
URI: http://qudt.org/vocab/unit/BTU_59DEG_F
unit of heat energy according to the Imperial system of units in a reference temperature of 59 °F
unit:BTU_60DEG_F
URI: http://qudt.org/vocab/unit/BTU_60DEG_F
unit of head energy according to the Imperial system of units at a reference temperature of 60 °F
unit:BTU_IT
URI: http://qudt.org/vocab/unit/BTU_IT
$\textit{British Thermal Unit}$ (BTU or Btu) is a traditional unit of energy equal to about $1.0550558526 \textit{ kilojoule}$. It is approximately the amount of energy needed to heat 1 pound (0.454 kg) of water from $39^{\circ}{F}$ to $40^{\circ}{F}$ . The unit is most often used in the power, steam generation, heating and air conditioning industries. In scientific contexts the BTU has largely been replaced by the SI unit of energy, the $joule$, though it may be used as a measure of agricultural energy production (BTU/kg). It is still used unofficially in metric English-speaking countries (such as Canada), and remains the standard unit of classification for air conditioning units manufactured and sold in many non-English-speaking metric countries.
unit:BTU_IT-FT
URI: http://qudt.org/vocab/unit/BTU_IT-FT
${\bf BTU_{IT} \, Foot}$ is an Imperial unit for $\textit{Thermal Energy Length}$ expressed as $Btu-ft$.
unit:BTU_IT-FT-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-FT-PER-FT2-HR-DEG_F
A $BTU_{IT}$, $\italic{Foot per Square Foot Hour Degree Fahrenheit}$ is an Imperial unit for 'Thermal Conductivity', expressed as $Btu_{it} \cdot ft/(h \cdot ft^2 \cdot degF)$.
unit:BTU_IT-IN
URI: http://qudt.org/vocab/unit/BTU_IT-IN
${\bf BTU \, Inch}$ is an Imperial unit for 'Thermal Energy Length' expressed as $Btu-in$.
unit:BTU_IT-IN-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-FT2-HR-DEG_F
$BTU_{th}$ Inch per Square Foot Hour Degree Fahrenheit is an Imperial unit for 'Thermal Conductivity' expressed as $Btu_{it}-in/(h-ft^{2}-degF)$. An International British thermal unit inch per second per square foot per degree Fahrenheit is a unit of thermal conductivity in the US Customary Units and British Imperial Units. $1\,Btu_{it} \cdot in/(h \cdot ft^{2} \cdot degF)$ shows that one thermochemical BTU of heat per one hour moves through one square foot of material, which is one foot thick due to a temperature difference of one degree Fahrenheit.
unit:BTU_IT-IN-PER-FT2-SEC-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-FT2-SEC-DEG_F
The unit $BTU_{IT}$, Inch per Square Foot Second Degree Fahrenheit, is an Imperial unit for 'Thermal Conductivity' expressed as $Btu_{it}-in/(ft^{2}-s-degF)$.
unit:BTU_IT-IN-PER-HR-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-HR-FT2-DEG_F
unit of the thermal conductivity according to the Imperial system of units
unit:BTU_IT-IN-PER-SEC-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-IN-PER-SEC-FT2-DEG_F
unit of the thermal conductivity according to the Imperial system of units
unit:BTU_IT-PER-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-DEG_F
$\textit{British Thermal Unit (IT) Per Fahrenheit Degree}$ ($Btu (IT)/^\circ F$) is a measure of heat capacity. It can be converted to the corresponding standard SI unit $J/K$ by multiplying its value by a factor of $1899.10534$.
unit:BTU_IT-PER-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-DEG_R
$\textit{BTU per Degree Rankine}$ is an Imperial unit for 'Heat Capacity' expressed as $Btu/degR$.
unit:BTU_IT-PER-FT2
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2
$\textit{BTU per Square Foot}$ is an Imperial unit for 'Energy Per Area' expressed as $Btu/ft^2$.
unit:BTU_IT-PER-FT2-HR
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2-HR
unit of the surface heat flux according to the Imperial system of units
unit:BTU_IT-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2-HR-DEG_F
$\textit{BTU per Square Foot Hour Degree Fahrenheit}$ is an Imperial unit for 'Coefficient Of Heat Transfer' expressed as $Btu/(h-ft^{2}-degF)$.
unit:BTU_IT-PER-FT2-SEC
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2-SEC
unit of the surface heat flux according to the Imperial system of units
unit:BTU_IT-PER-FT2-SEC-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT2-SEC-DEG_F
$\textit{BTU per Square Foot Second Degree Fahrenheit}$ is an Imperial unit for 'Coefficient Of Heat Transfer' expressed as $Btu/(ft^{2}-s-degF)$.
unit:BTU_IT-PER-FT3
URI: http://qudt.org/vocab/unit/BTU_IT-PER-FT3
$\textit{British Thermal Unit (IT) Per Cubic Foot}$ ($Btu (IT)/ft^3$) is a unit in the category of Energy density. It is also known as Btu per cubic foot, Btu/cubic foot. This unit is commonly used in the UK, US unit systems. It has a dimension of $ML^{-1}T^{-2}$ where $M$ is mass, $L$ is length, and $T$ is time. It can be converted to the corresponding standard SI unit $J/m^3$ by multiplying its value by a factor of 37258.94579.
unit:BTU_IT-PER-HR
URI: http://qudt.org/vocab/unit/BTU_IT-PER-HR
The $\text{BTU per Hour}$ is the amount of energy that is being produced or consumed per hour.
unit:BTU_IT-PER-HR-FT2
URI: http://qudt.org/vocab/unit/BTU_IT-PER-HR-FT2
$\textit{BTU per Hour Square Foot}$ is an Imperial unit for 'Power Per Area' expressed as $Btu/(h-ft^2)$.
unit:BTU_IT-PER-HR-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-HR-FT2-DEG_F
unit of the heat transition coefficient according to the Imperial system of units
unit:BTU_IT-PER-HR-FT2-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-HR-FT2-DEG_R
unit of the heat transfer coefficient according to the Imperial system of units
unit:BTU_IT-PER-IN2-SEC
URI: http://qudt.org/vocab/unit/BTU_IT-PER-IN2-SEC
unit of the surface heat flux according to the Imperial system of units
unit:BTU_IT-PER-LB
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB
The amount of energy generated by a pound of substance is measured in British thermal units (IT) per pound of mass. 1 $Btu_{IT}/lb$ is equivalent to $2.326 \times 10^3$ joule per kilogram (J/kg).
unit:BTU_IT-PER-LB-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB-DEG_F
British Thermal Unit (therm.) Per Pound Per Fahrenheit Degree (Btu (therm.)/lb- degF) is a unit in the category of Specific heat. This unit is commonly used in the UK unit system. British Thermal Unit (therm.) Per Pound Per Fahrenheit Degree (Btu (therm.)/lb-degF) has a dimension of $L2T^{-2}Q^{-1}$ where $L$ is length, $T$ is time, and $Q$ is temperature. It can be converted to the corresponding standard SI unit $J/kg-K$ by multiplying its value by a factor of 4183.99895.
unit:BTU_IT-PER-LB-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB-DEG_R
${\bf BTU \, per \, Pound \, Degree \, Rankine}$ is a unit for 'Specific Heat Capacity' expressed as $Btu/(lb-degR)$.
unit:BTU_IT-PER-LB-MOL
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB-MOL
${\bf BTU \, per \, Pound \,Mole}$ is an Imperial unit for 'Energy And Work Per Mass Amount Of Substance' expressed as $Btu/(lb-mol)$.
unit:BTU_IT-PER-LB_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB_F
Unit of heat energy according to the Imperial system of units divided by the unit avoirdupois pound of force according to the avoirdupois system of units
unit:BTU_IT-PER-LB_F-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB_F-DEG_F
Unit of heat energy according to the Imperial system of units divided by the product of a pound of force and a degree Fahrenheit
unit:BTU_IT-PER-LB_F-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-LB_F-DEG_R
Unit of heat energy according to the Imperial system of units divided by the product of a pound of force and a degree Rankine
unit:BTU_IT-PER-MIN
URI: http://qudt.org/vocab/unit/BTU_IT-PER-MIN
unit of the heat energy according to the Imperial system of units divided by the unit minute
unit:BTU_IT-PER-MOL-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-MOL-DEG_F
${\bf BTU \, per \, Pound \, Mole \, Degree \, Fahrenheit}$ is an Imperial unit for 'Molar Heat Capacity' expressed as $Btu/(lb-mol-degF)$.
unit:BTU_IT-PER-MOL_LB
URI: http://qudt.org/vocab/unit/BTU_IT-PER-MOL_LB
${\bf BTU \, per \, Pound \,Mole}$ is an Imperial unit for 'Energy And Work Per Mass Amount Of Substance' expressed as $Btu/(lb-mol)$.
unit:BTU_IT-PER-MOL_LB-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-MOL_LB-DEG_F
${\bf BTU \, per \, Pound \, Mole \, Degree \, Fahrenheit}$ is an Imperial unit for 'Molar Heat Capacity' expressed as $Btu/(lb-mol-degF)$.
unit:BTU_IT-PER-SEC
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC
${\bf BTU \, per \, Second}$ is an Imperial unit for 'Heat Flow Rate' expressed as $Btu/s$.
unit:BTU_IT-PER-SEC-FT-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC-FT-DEG_R
unit of the thermal conductivity according to the Imperial system of units
unit:BTU_IT-PER-SEC-FT2
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC-FT2
$\textit{BTU per Second Square Foot}$ is an Imperial unit for 'Power Per Area' expressed as $Btu/(s\cdot ft^2)$.
unit:BTU_IT-PER-SEC-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC-FT2-DEG_F
unit of the heat transition coefficient according to the imperial system of units
unit:BTU_IT-PER-SEC-FT2-DEG_R
URI: http://qudt.org/vocab/unit/BTU_IT-PER-SEC-FT2-DEG_R
unit of the heat transfer coefficient according to the Imperial system of units
unit:BTU_MEAN
URI: http://qudt.org/vocab/unit/BTU_MEAN
unit of the heat energy according to the Imperial system of units
unit:BTU_TH
URI: http://qudt.org/vocab/unit/BTU_TH
The $\textit{British Thermal Unit (thermochemical definition)}$ ($BTU_{th}$), is a traditional unit of energy equal to about $1.0543502645 kilojoule$. It is approximately the amount of energy needed to heat 1 pound (0.454 kg) of water from $39^{\circ}\text{F}$ ($3.9^{\circ}\text{C}$) to $40^{\circ}\text{F}$ ($4.4^{\circ}\text{C}$). The unit is most often used in the power, steam generation, heating and air conditioning industries. In scientific contexts the BTU has largely been replaced by the SI unit of energy, the $joule$.
unit:BTU_TH-FT-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-FT-PER-FT2-HR-DEG_F
The $\textit{BTU (TH) Foot per Square Foot Hour Degree Fahrenheit}$ is an Imperial unit for 'Thermal Conductivity' defined as: $$Btu_{th} \cdot ft/(h \cdot ft^2 \cdot degF)$$.
unit:BTU_TH-FT-PER-HR-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-FT-PER-HR-FT2-DEG_F
The $\textit{British Thermal Unit (thermochemical) Foot Per Hour Square Foot degree Fahrenheit}$ is a unit of thermal conductivity in the Imperial system of units.
unit:BTU_TH-IN-PER-FT2-HR-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-IN-PER-FT2-HR-DEG_F
${\bf BTU_{th}}$, Inch per Square Foot Hour Degree Fahrenheit, is an Imperial unit for 'Thermal Conductivity' expressed as $Btu-in/(h-ft^{2}-degF)$. A thermochemical British thermal unit inch per second per square foot per degree Fahrenheit is a unit of thermal conductivity in the US Customary Units and British Imperial Units. $1 Btu_{th} \cdot in/(h \cdot ft^{2} \cdot degF)$ shows that one thermochemical BTU of heat per one hour moves through one square foot of material, which is one foot thick due to a temperature difference of one degree Fahrenheit.
unit:BTU_TH-IN-PER-FT2-SEC-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-IN-PER-FT2-SEC-DEG_F
The $\textit{BTU (TH) Inch per Square Foot Second Degree Fahrenheit}$ is an Imperial unit for 'Thermal Conductivity' expressed as: $$Btu_{th} \cdot in/(ft^{2} \cdot s \cdot degF)$$.
unit:BTU_TH-PER-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-PER-DEG_F
unit of the heat capacity according to the Imperial system of units
unit:BTU_TH-PER-DEG_R
URI: http://qudt.org/vocab/unit/BTU_TH-PER-DEG_R
unit of the heat capacity according to the Imperial system of units
unit:BTU_TH-PER-FT2
URI: http://qudt.org/vocab/unit/BTU_TH-PER-FT2
unit of the areal-related energy transmisson according to the Imperial system of units
unit:BTU_TH-PER-FT2-HR
URI: http://qudt.org/vocab/unit/BTU_TH-PER-FT2-HR
unit of the surface heat flux according to the Imperial system of units
unit:BTU_TH-PER-FT2-MIN
URI: http://qudt.org/vocab/unit/BTU_TH-PER-FT2-MIN
unit of the surface heat flux according to the Imperial system of units
unit:BTU_TH-PER-FT2-SEC
URI: http://qudt.org/vocab/unit/BTU_TH-PER-FT2-SEC
unit of the surface heat flux according to the Imperial system of units
unit:BTU_TH-PER-FT3
URI: http://qudt.org/vocab/unit/BTU_TH-PER-FT3
British Thermal Unit (TH) Per Cubic Foot ($Btu (TH)/ft^3$) is a unit in the category of Energy density. It is also known as Btu per cubic foot, Btu/cubic foot. This unit is commonly used in the UK, US unit systems. It has a dimension of $ML^{-1}T^{-2}$ where $M$ is mass, $L$ is length, and $T$ is time. It can be converted to the corresponding standard SI unit $J/m^3$ by multiplying its value by a factor of 37234.03.
unit:BTU_TH-PER-HR
URI: http://qudt.org/vocab/unit/BTU_TH-PER-HR
unit of the heat energy according to the Imperial system of units divided by the unit hour
unit:BTU_TH-PER-HR-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-PER-HR-FT2-DEG_F
unit of the heat transition coefficient according to the imperial system of units
unit:BTU_TH-PER-LB
URI: http://qudt.org/vocab/unit/BTU_TH-PER-LB
${\bf Btu_{th} / lbm}$, British Thermal Unit (therm.) Per Pound Mass, is a unit in the category of Thermal heat capacity. It is also known as Btu per pound, Btu/pound, Btu/lb. This unit is commonly used in the UK unit system. British Thermal Unit (therm.) Per Pound Mass (Btu (therm.)/lbm) has a dimension of $L^2T^{-2}$ where $L$ is length, and $T$ is time. It can be converted to the corresponding standard SI unit J/kg by multiplying its value by a factor of 2324.443861.
unit:BTU_TH-PER-LB-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-PER-LB-DEG_F
unit of the thermal conductivity according to the Imperial system of units divided by the units pound and degree Fahrenheit
unit:BTU_TH-PER-LB-DEG_R
URI: http://qudt.org/vocab/unit/BTU_TH-PER-LB-DEG_R
unit of the heat capacity (British Thermal Unit - thermochemical - according to the international table according to the Rankine degree) according to the Imperial system of units divided by the unit avoirdupois pound according to the avoirdupois system of units
unit:BTU_TH-PER-MIN
URI: http://qudt.org/vocab/unit/BTU_TH-PER-MIN
unit of the heat energy according to the Imperial system of units divided by the unit minute
unit:BTU_TH-PER-SEC
URI: http://qudt.org/vocab/unit/BTU_TH-PER-SEC
unit of the heat energy according to the Imperial system of units divided by the SI base unit second
unit:BTU_TH-PER-SEC-FT2-DEG_F
URI: http://qudt.org/vocab/unit/BTU_TH-PER-SEC-FT2-DEG_F
unit of the heat transition coefficient according to the imperial system of units
unit:BU_UK
URI: http://qudt.org/vocab/unit/BU_UK
A bushel is an imperial unit of dry volume, equivalent in each of these systems to 4 pecks or 8 gallons. It is used for volumes of dry commodities (not liquids), most often in agriculture. It is abbreviated as bsh. or bu. In modern usage, the dry volume is usually only nominal, with bushels referring to standard weights instead.
unit:BU_UK-PER-DAY
URI: http://qudt.org/vocab/unit/BU_UK-PER-DAY
unit of the volume bushel (UK) (for fluids and for dry measures) according to the Imperial system of units divided by the unit for time day
unit:BU_UK-PER-HR
URI: http://qudt.org/vocab/unit/BU_UK-PER-HR
unit of the volume bushel (UK) (for fluids and for dry measures) according to the Imperial system of units divided by the unit for time hour
unit:BU_UK-PER-MIN
URI: http://qudt.org/vocab/unit/BU_UK-PER-MIN
unit of the volume bushel (UK) (for fluids and for dry measures) according to the Imperial system of units divided by the unit for time minute
unit:BU_UK-PER-SEC
URI: http://qudt.org/vocab/unit/BU_UK-PER-SEC
unit of the volume bushel (UK) (for fluids and for dry measures) according to the Imperial system of units divided by the SI base unit second
unit:BU_US
URI: http://qudt.org/vocab/unit/BU_US
A bushel is an imperial and U.S. customary unit of dry volume, equivalent in each of these systems to 4 pecks or 8 gallons. It is used for volumes of dry commodities (not liquids), most often in agriculture. It is abbreviated as bsh. or bu. In modern usage, the dry volume is usually only nominal, with bushels referring to standard weights instead.
unit:BU_US_DRY-PER-DAY
URI: http://qudt.org/vocab/unit/BU_US_DRY-PER-DAY
unit of the volume bushel (US dry) for dry measure according to the Anglo-American system of units divided by the unit for time day
unit:BU_US_DRY-PER-HR
URI: http://qudt.org/vocab/unit/BU_US_DRY-PER-HR
unit of the volume bushel (US dry) for dry measure according to the Anglo-American system of units divided by the unit for time hour
unit:BU_US_DRY-PER-MIN
URI: http://qudt.org/vocab/unit/BU_US_DRY-PER-MIN
unit of the volume bushel (US dry) for dry measure according to the Anglo-American system of units divided by the unit for time minute
unit:BU_US_DRY-PER-SEC
URI: http://qudt.org/vocab/unit/BU_US_DRY-PER-SEC
unit of the volume bushel (US dry) for dry measure according to the Anglo-American system of units divided by the SI base unit second
unit:BYTE
URI: http://qudt.org/vocab/unit/BYTE
The byte is a unit of digital information in computing and telecommunications that most commonly consists of eight bits.
unit:BYTE-PER-SEC
URI: http://qudt.org/vocab/unit/BYTE-PER-SEC
unit byte divided by the SI base unit second
unit:C
URI: http://qudt.org/vocab/unit/C
The SI unit of electric charge. One coulomb is the amount of charge accumulated in one second by a current of one ampere. Electricity is actually a flow of charged particles, such as electrons, protons, or ions. The charge on one of these particles is a whole-number multiple of the charge e on a single electron, and one coulomb represents a charge of approximately 6.241 506 x 1018 e. The coulomb is named for a French physicist, Charles-Augustin de Coulomb (1736-1806), who was the first to measure accurately the forces exerted between electric charges.
unit:C-M
URI: http://qudt.org/vocab/unit/C-M
The $\text{Coulomb Meter (C-m)}$ is a unit in the category of Electric dipole moment. It is also known as atomic unit, u.a., au, ua. This unit is commonly used in the SI unit system. Coulomb Meter (C-m) has a dimension of LTI where $L$ is length, $T$ is time, and $I$ is electric current. This unit is the standard SI unit in this category.
unit:C-M2
URI: http://qudt.org/vocab/unit/C-M2
Coulomb Square Meter (C-m2) is a unit in the category of Electric quadrupole moment. This unit is commonly used in the SI unit system. Coulomb Square Meter (C-m2) has a dimension of L2TI where $L$ is length, $T$ is time, and $I$ is electric current. This unit is the standard SI unit in this category.
unit:C-M2-PER-KiloGM
URI: http://qudt.org/vocab/unit/C-M2-PER-KiloGM
product of the SI derived unit coulomb and the power of the SI base unit metre with the exponent 2 divided by the SI base unit kilogram
unit:C-M2-PER-V
URI: http://qudt.org/vocab/unit/C-M2-PER-V
Coulomb Square Meter (C-m2-per-volt) is a unit in the category of Electric polarizability.
unit:C-PER-CentiM2
URI: http://qudt.org/vocab/unit/C-PER-CentiM2
derived SI unit coulomb divided by the 0.0001-fold of the power of the SI base unit metre by exponent 2
unit:C-PER-CentiM3
URI: http://qudt.org/vocab/unit/C-PER-CentiM3
derived SI unit coulomb divided by the 0.000 001-fold of the power of the SI base unit metre by exponent 3
unit:C-PER-KiloGM
URI: http://qudt.org/vocab/unit/C-PER-KiloGM
$\textit{Coulomb Per Kilogram (C/kg)}$ is the unit in the category of Exposure. It is also known as coulombs per kilogram, coulomb/kilogram. This unit is commonly used in the SI unit system. Coulomb Per Kilogram (C/kg) has a dimension of $M^{-1}TI$ where $M$ is mass, $T$ is time, and $I$ is electric current. This unit is the standard SI unit in this category.
unit:C-PER-KiloGM-SEC
URI: http://qudt.org/vocab/unit/C-PER-KiloGM-SEC
The SI unit of exposure rate
unit:C-PER-M
URI: http://qudt.org/vocab/unit/C-PER-M
"Coulomb per Meter" is a unit for 'Electric Charge Line Density' expressed as $C/m$.
unit:C-PER-M2
URI: http://qudt.org/vocab/unit/C-PER-M2
Coulomb Per Square Meter ($C/m^2$) is a unit in the category of Electric charge surface density. It is also known as coulombs per square meter, coulomb per square metre, coulombs per square metre, coulomb/square meter, coulomb/square metre. This unit is commonly used in the SI unit system. Coulomb Per Square Meter (C/m2) has a dimension of $L^{-2}TI$ where $L$ is length, $T$ is time, and $I$ is electric current. This unit is the standard SI unit in this category.
unit:C-PER-M3
URI: http://qudt.org/vocab/unit/C-PER-M3
Coulomb Per Cubic Meter ($C/m^{3}$) is a unit in the category of Electric charge density. It is also known as coulomb per cubic metre, coulombs per cubic meter, coulombs per cubic metre, coulomb/cubic meter, coulomb/cubic metre. This unit is commonly used in the SI unit system. Coulomb Per Cubic Meter has a dimension of $L^{-3}TI$ where $L$ is length, $T$ is time, and $I$ is electric current. This unit is the standard SI unit in this category.
unit:C-PER-MOL
URI: http://qudt.org/vocab/unit/C-PER-MOL
($C/mol$) is a unit in the category of Molar electric charge. It is also known as $coulombs/mol$. Coulomb Per Mol has a dimension of $TN{-1}I$ where $T$ is time, $N$ is amount of substance, and $I$ is electric current. This unit is the standard SI unit in this category.
unit:C-PER-MilliM2
URI: http://qudt.org/vocab/unit/C-PER-MilliM2
derived SI unit coulomb divided by the 0.000 001-fold of the power of the SI base unit metre by exponent 2
unit:C-PER-MilliM3
URI: http://qudt.org/vocab/unit/C-PER-MilliM3
derived SI unit coulomb divided by the 0.000 000 001-fold of the power of the SI base unit metre by exponent 3
unit:C2-M2-PER-J
URI: http://qudt.org/vocab/unit/C2-M2-PER-J
"Square Coulomb Square Meter per Joule" is a unit for 'Polarizability' expressed as $C^{2} m^{2} J^{-1}$.
unit:C3-M-PER-J2
URI: http://qudt.org/vocab/unit/C3-M-PER-J2
"Cubic Coulomb Meter per Square Joule" is a unit for 'Cubic Electric Dipole Moment Per Square Energy' expressed as $C^{3} m^{3} J^{-2}$.
unit:C4-M4-PER-J3
URI: http://qudt.org/vocab/unit/C4-M4-PER-J3
"Quartic Coulomb Meter per Cubic Energy" is a unit for 'Quartic Electric Dipole Moment Per Cubic Energy' expressed as $C^{4} m^{4} J^{-3}$.
unit:CAL_15_DEG_C
URI: http://qudt.org/vocab/unit/CAL_15_DEG_C
unit for the quantity of heat which is required to warm up 1 g of water, which is free of air, at a constant pressure of 101.325 kPa (the pressure of the standard atmosphere on sea level) from 14.5 degrees Celsius to 15.5 degrees Celsius
unit:CAL_20DEG_C
URI: http://qudt.org/vocab/unit/CAL_20DEG_C
unit for quantity of heat, which is to be required for 1 g air free water at a constant pressure from 101,325 kPa, to warm up the pressure of standard atmosphere at sea level, from 19.5 °C on 20.5 °C
unit:CAL_IT-PER-GM
URI: http://qudt.org/vocab/unit/CAL_IT-PER-GM
Calories produced per gram of substance.
unit:CAL_IT-PER-GM-DEG_C
URI: http://qudt.org/vocab/unit/CAL_IT-PER-GM-DEG_C
unit calorieIT divided by the products of the units gram and degree Celsius
unit:CAL_IT-PER-GM-K
URI: http://qudt.org/vocab/unit/CAL_IT-PER-GM-K
unit calorieIT divided by the product of the SI base unit gram and Kelvin
unit:CAL_IT-PER-SEC-CentiM-K
URI: http://qudt.org/vocab/unit/CAL_IT-PER-SEC-CentiM-K
unit of the thermal conductivity according to the Imperial system of units
unit:CAL_IT-PER-SEC-CentiM2-K
URI: http://qudt.org/vocab/unit/CAL_IT-PER-SEC-CentiM2-K
unit of the heat transfer coefficient according to the Imperial system of units
unit:CAL_MEAN
URI: http://qudt.org/vocab/unit/CAL_MEAN
unit used particularly for calorific values of foods
unit:CAL_TH
URI: http://qudt.org/vocab/unit/CAL_TH
The energy needed to increase the temperature of a given mass of water by $1 ^\circ C$ at atmospheric pressure depends on the starting temperature and is difficult to measure precisely. Accordingly, there have been several definitions of the calorie. The two perhaps most popular definitions used in older literature are the $15 ^\circ C$ calorie and the thermochemical calorie.
unit:CAL_TH-PER-CentiM-SEC-DEG_C
URI: http://qudt.org/vocab/unit/CAL_TH-PER-CentiM-SEC-DEG_C
unit of the thermal conductivity according to the Imperial system of units
unit:CAL_TH-PER-CentiM2
URI: http://qudt.org/vocab/unit/CAL_TH-PER-CentiM2
unit of the areal-related energy transmisson according to the Imperial system of units
unit:CAL_TH-PER-CentiM2-MIN
URI: http://qudt.org/vocab/unit/CAL_TH-PER-CentiM2-MIN
unit of the surface heat flux according to the Imperial system of units
unit:CAL_TH-PER-CentiM2-SEC
URI: http://qudt.org/vocab/unit/CAL_TH-PER-CentiM2-SEC
unit of the surface heat flux according to the Imperial system of units
unit:CAL_TH-PER-CentiM3-K
URI: http://qudt.org/vocab/unit/CAL_TH-PER-CentiM3-K
$\textit{Thermochemical Calorie per Cubic Centimeter Kelvin}$ is a unit for 'Volumetric Heat Capacity' expressed as $cal_th/(cm^{3} K)$.
unit:CAL_TH-PER-G
URI: http://qudt.org/vocab/unit/CAL_TH-PER-G
The unit $\textit{Thermochemical Calorie per Gram}$ measures the amount of energy, in thermochemical calories, contained in or required to heat up one gram of a substance. This unit is often used to describe the energy content of substances or the energy released/absorbed in chemical reactions relative to the mass of the substance involved.
unit:CAL_TH-PER-GM
URI: http://qudt.org/vocab/unit/CAL_TH-PER-GM
Thermochemical Calorie. Calories produced per gram of substance.
unit:CAL_TH-PER-GM-DEG_C
URI: http://qudt.org/vocab/unit/CAL_TH-PER-GM-DEG_C
unit calorie (thermochemical) divided by the product of the unit gram and degree Celsius
unit:CAL_TH-PER-GM-K
URI: http://qudt.org/vocab/unit/CAL_TH-PER-GM-K
unit calorie (thermochemical) divided by the product of the SI derived unit gram and the SI base unit Kelvin
unit:CAL_TH-PER-MIN
URI: http://qudt.org/vocab/unit/CAL_TH-PER-MIN
unit calorie divided by the unit minute
unit:CAL_TH-PER-SEC
URI: http://qudt.org/vocab/unit/CAL_TH-PER-SEC
unit calorie divided by the SI base unit second
unit:CAL_TH-PER-SEC-CentiM-K
URI: http://qudt.org/vocab/unit/CAL_TH-PER-SEC-CentiM-K
unit of the thermal conductivity according to the Imperial system of units
unit:CAL_TH-PER-SEC-CentiM2-K
URI: http://qudt.org/vocab/unit/CAL_TH-PER-SEC-CentiM2-K
unit of the heat transfer coefficient according to the Imperial system of units
unit:CARAT
URI: http://qudt.org/vocab/unit/CARAT
The carat is a unit of mass equal to 200 mg and is used for measuring gemstones and pearls. The current definition, sometimes known as the metric carat, was adopted in 1907 at the Fourth General Conference on Weights and Measures, and soon afterward in many countries around the world. The carat is divisible into one hundred points of two milligrams each. Other subdivisions, and slightly different mass values, have been used in the past in different locations. In terms of diamonds, a paragon is a flawless stone of at least 100 carats (20 g). The ANSI X.12 EDI standard abbreviation for the carat is $CD$.
unit:CASES-PER-1000I-YR
URI: http://qudt.org/vocab/unit/CASES-PER-1000I-YR
The typical expression of morbidity rate, expressed as cases per 1000 individuals, per year.
unit:CASES-PER-KiloINDIV-YR
URI: http://qudt.org/vocab/unit/CASES-PER-KiloINDIV-YR
The typical expression of morbidity rate, expressed as cases per 1000 individuals, per year.
unit:CD
URI: http://qudt.org/vocab/unit/CD
$\textit{Candela}$ is a unit for 'Luminous Intensity' expressed as $cd$. The candela is the SI base unit of luminous intensity; that is, power emitted by a light source in a particular direction, weighted by the luminosity function (a standardized model of the sensitivity of the human eye to different wavelengths, also known as the luminous efficiency function). A common candle emits light with a luminous intensity of roughly one candela.
unit:CD-PER-FT2
URI: http://qudt.org/vocab/unit/CD-PER-FT2
base unit SI candela divided by the power of the unit foot according to the Anglo-American and Imperial system of units by exponent 2
unit:CD-PER-IN2
URI: http://qudt.org/vocab/unit/CD-PER-IN2
"Candela per Square Inch" is a unit for 'Luminance' expressed as $cd/in^{2}$.
unit:CD-PER-M2
URI: http://qudt.org/vocab/unit/CD-PER-M2
The candela per square metre ($cd/m^2$) is the derived SI unit of luminance. The unit is based on the candela, the SI unit of luminous intensity, and the square metre, the SI unit of area. Nit (nt) is a deprecated non-SI name also used for this unit ($1 nit = 1 cd/m^2$). As a measure of light emitted per unit area, this unit is frequently used to specify the brightness of a display device. Most consumer desktop liquid crystal displays have luminances of 200 to 300 $cd/m^2$; the sRGB spec for monitors targets 80 cd/m2. HDTVs range from 450 to about 1000 cd/m2. Typically, calibrated monitors should have a brightness of $120 cd/m^2$. $Nit$ is believed to come from the Latin word nitere, to shine.
unit:CD_IN
URI: http://qudt.org/vocab/unit/CD_IN
obsolete, non-legal unit of the power in Germany relating to DIN 1301-3:1979
unit:CFU
URI: http://qudt.org/vocab/unit/CFU
"Colony Forming Unit" is a unit for 'Microbial Formation' expressed as $CFU$.
unit:CH
URI: http://qudt.org/vocab/unit/CH
A chain is a unit of length. It measures 66 feet, or 22 yards, or 100 links, or 4 rods. There are 10 chains in a furlong, and 80 chains in one statute mile. An acre is the area of 10 square chains (that is, an area of one chain by one furlong). The chain has been used for several centuries in Britain and in some other countries influenced by British practice.
unit:CHAIN_US
URI: http://qudt.org/vocab/unit/CHAIN_US
unit of the length according the Anglo-American system of units
unit:CI
URI: http://qudt.org/vocab/unit/CI
The curie (symbol Ci) is a non-SI unit of radioactivity, named after Marie and Pierre Curie. It is defined as $1Ci = 3.7 \times 10^{10} decays\ per\ second$. Its continued use is discouraged. One Curie is roughly the activity of 1 gram of the radium isotope Ra, a substance studied by the Curies. The SI derived unit of radioactivity is the becquerel (Bq), which equates to one decay per second. Therefore: $1Ci = 3.7 \times 10^{10} Bq= 37 GBq$ and $1Bq \equiv 2.703 \times 10^{-11}Ci $.
unit:CI-PER-KiloGM
URI: http://qudt.org/vocab/unit/CI-PER-KiloGM
1,000-fold of the unit curie divided by the SI base unit kilogram
unit:CLO
URI: http://qudt.org/vocab/unit/CLO
A C.G.S System unit for $\textit{Thermal Insulance}$ expressed as "clo".
unit:CORD
URI: http://qudt.org/vocab/unit/CORD
The cord is a unit of measure of dry volume used in Canada and the United States to measure firewood and pulpwood. A cord is the amount of wood that, when 'ranked and well stowed' (arranged so pieces are aligned, parallel, touching and compact), occupies a volume of 128 cubic feet (3.62 cubic metres). This corresponds to a well stacked woodpile 4 feet (122 cm) wide, 4 feet (122 cm) high, and 8 feet (244 cm) long; or any other arrangement of linear measurements that yields the same volume. The name cord probably comes from the use of a cord or string to measure it.
unit:CP
URI: http://qudt.org/vocab/unit/CP
"Candlepower" (abbreviated as cp) is a now-obsolete unit which was used to express levels of light intensity in terms of the light emitted by a candle of specific size and constituents. In modern usage Candlepower equates directly to the unit known as the candela.
unit:CUP
URI: http://qudt.org/vocab/unit/CUP
"US Liquid Cup" is a unit for 'Liquid Volume' expressed as $cup$.
unit:CUP_US
URI: http://qudt.org/vocab/unit/CUP_US
unit of the volume according to the Anglo-American system of units
unit:CWT_LONG
URI: http://qudt.org/vocab/unit/CWT_LONG
"Hundred Weight - Long" is a unit for 'Mass' expressed as $cwt$.
unit:CWT_SHORT
URI: http://qudt.org/vocab/unit/CWT_SHORT
"Hundred Weight - Short" is a unit for 'Mass' expressed as $cwt$.
unit:CYC-PER-SEC
URI: http://qudt.org/vocab/unit/CYC-PER-SEC
The "cycle per second" is a once-common English name for the unit of frequency now known as the hertz (Hz).
unit:C_Ab
URI: http://qudt.org/vocab/unit/C_Ab
"abcoulomb" (abC or aC) or electromagnetic unit of charge (emu of charge) is the basic physical unit of electric charge in the cgs-emu system of units. One abcoulomb is equal to ten coulombs ($1\,abC\,=\,10\,C$).
unit:C_Ab-PER-CentiM2
URI: http://qudt.org/vocab/unit/C_Ab-PER-CentiM2
Abcoulomb Per Square Centimeter is a unit in the category of Electric charge surface density. It is also known as abcoulombs per square centimeter, abcoulomb per square centimetre, abcoulombs per square centimetre, abcoulomb/square centimeter,abcoulomb/square centimetre. This unit is commonly used in the cgs unit system. Abcoulomb Per Square Centimeter (abcoulomb/cm2) has a dimension of $L_2TI$. where $L$ is length, $T$ is time, and $I$ is electric current. It can be converted to the corresponding standard SI unit $C/m^2$ by multiplying its value by a factor of 100,000.
unit:C_Stat
URI: http://qudt.org/vocab/unit/C_Stat
The statcoulomb ($statC$) or franklin ($Fr$) or electrostatic unit of charge ($esu$) is the physical unit for electrical charge used in the centimetre-gram-second system of units (cgs) and Gaussian units. It is a derived unit given by $1\ statC = 1\ g\ cm\ s = 1\ erg\ cm$. The SI system of units uses the coulomb (C) instead. The conversion between C and statC is different in different contexts. The number 2997924580 is 10 times the value of the speed of light expressed in meters/second, and the conversions are exact except where indicated. The coulomb is an extremely large charge rarely encountered in electrostatics, while the statcoulomb is closer to everyday charges.
unit:C_Stat-PER-CentiM2
URI: http://qudt.org/vocab/unit/C_Stat-PER-CentiM2
$\textit{Statcoulomb per Square Centimeter}$ is a unit of measure for electric flux density and electric polarization. One Statcoulomb per Square Centimeter is $2.15\times 10^9 \, coulomb\,per\,square\,inch$.
unit:C_Stat-PER-MOL
URI: http://qudt.org/vocab/unit/C_Stat-PER-MOL
"Statcoulomb per Mole" is a unit of measure for the electical charge associated with one mole of a substance. The mole is a unit of measurement used in chemistry to express amounts of a chemical substance, defined as an amount of a substance that contains as many elementary entities (e.g., atoms, molecules, ions, electrons) as there are atoms in 12 grams of pure carbon-12 (12C), the isotope of carbon with atomic weight 12.
unit:CentiBAR
URI: http://qudt.org/vocab/unit/CentiBAR
The bar is a non-SI unit of pressure, defined by the IUPAC as exactly equal to 100,000 Pa. It is about equal to the atmospheric pressure on Earth at sea level, and since 1982 the IUPAC has recommended that the standard for atmospheric pressure should be harmonized to $100,000\,Pa = 1 bar \approx 750.0616827 Torr$. Units derived from the bar are the megabar (symbol: Mbar), kilobar (symbol: kbar), decibar (symbol: dbar), centibar (symbol: cbar), and millibar (symbol: mbar or mb). They are not SI or cgs units, but they are accepted for use with the SI.