| absorbed-dose |
union |
[A]bsorbed dose, kerma, gray, Gy = m^2 s^−2, J/kg. |
| absorbed-dose-rate |
union |
[A]bsorbed dose rate, gray per second, Gy s^−1, m^2 s^−3. |
| acceleration |
union |
A measure of the change in velocity of a physical body during a time interval of
1 second. |
| activity |
union |
[A]ctivity referred to a radionuclide, becquerel, Bq = s^−1. |
| amount-concentration |
union |
Derived unit expressed in terms of base units: mol m^-3 |
| amount-of-substance |
union |
1. The mole is the amount of substance of a system which contains as many
elementary entities as there are atoms in 0.012 kilogram of carbon 12; its
symbol is 'mol.'
2. When the mole is used, the elementary entities must be specified and may be
atoms, molecules, ions, electrons, other particles, or specified groups of
such particles. |
| angular-acceleration |
union |
[A]ngular acceleration, radian per second squared, rad/s^2, s−2. |
| angular-velocity |
union |
[A]ngular velocity, angular frequency, radian per second, rad s^−1, s^−1. |
| area |
union |
A measure of the total area occupied by the surface of a physical body |
| capacitance |
union |
Derived unit expressed in terms of base units: A^2 s^4 kg^-1 m^-2. [C]apacitance, farad, F = kg^−1 m^−2 s^4 A^2, C/V. |
| catalytic-activity |
union |
[C]atalytic activity, katal, kat = mol s^−1. |
| catalytic-activity-concentration |
union |
[C]atalytic activity concentration, katal per cubic meter, kat m^−3, mol s^−1 m^−3. |
| current-density |
union |
Derived unit expressed in terms of base units: A m^-2 |
| dose-equivalent |
union |
[D]ose equivalent, sievert, Sv = m^2 s^−2, J/kg. |
| dynamic-viscosity |
union |
[D]ynamic viscosity, pascal second, Pa s, kg m^−1 s^−1. |
| electric-charge |
union |
Derived unit expressed in terms of base units: A s.
[C]harge, coulomb, C = A s. |
| electric-charge-density |
union |
[E]lectric charge density, coulomb per cubic meter, C m^−3 A s m^−3. |
| electric-conductance |
union |
Derived unit expressed in terms of base units: s^3 A^2 kg^-1 m^-2. [E]lectric conductance, siemens, S = kg^−1 m^−2 s^3 A^2, A/V. |
| electric-current |
union |
The ampere is that constant current which, if maintained in two straight
parallel conductors of infinite length, of negligible circular cross-section,
and placed 1 metre apart in vacuum, would produce between these conductors a
force equal to 2 × 10−7 newton per metre of length. |
| electric-field-strength |
union |
[E]lectric field strength, volt per meter, V m^−1, kg m s^−3 A^−1. |
| electric-flux-density |
union |
[E]lectric flux density, electric displacement, coulomb per square meter, C m^−2, A s m^−2. |
| electric-potential-difference |
union |
Derived unit expressed in terms of base units: kg m^2 s^-3 A^-1. [E]lectric potential difference, volt, V = kg m^2 s^−3 A^−1, W/A. |
| electric-resistance |
union |
Derived unit expressed in terms of base units: kg m^2 s^-3 A^-2. [E]lectric resistance, ohm, Ω = kg m^2 s^−3 A^−2, V/A. |
| energy |
union |
Derived unit expressed in terms of base units: kg m^2 s^-2. [E]nergy, work, joule, J = kg m^2 s^−2 N m. |
| energy-density |
union |
[E]nergy density, joule per cubic meter, J m^−3, kg m^−1 s^−2. |
| exposure |
union |
[E]xposure (x- and γ-rays), coulomb per kilogram, C kg^−1, A s kg^−1. |
| force |
union |
Derived unit expressed in terms of base units: kg m s^-2. [F]orce, newton, N = kg m s−2. |
| frequency |
union |
Derived unit expressed in terms of base units: s^-1. [F]requency, hertz, Hz = s^−1. |
| heat-capacity |
union |
[H]eat capacity, entropy, joule per kelvin, J K^−1, kg m^2 s^−2 K^−1. |
| heat-flux-density |
union |
[H]eat flux density, irradiance, watt per square meter, W/m^2, kg s^−3. |
| illuminance |
union |
[I]lluminance, lux, lx = cd sr m^−2, lm/m^2. |
| inductance |
union |
[I]nductance, henry, H = kg m^2 s^−2 A^−2, Wb/A. |
| kynematic-viscosity |
union |
|
| length |
union |
The metre is the length of the path travelled by light in vacuum during a time
interval of 1/299 792 458 of a second. |
| luminance |
union |
Derived unit expressed in terms of base units: cd m^-2 |
| luminous-flux |
union |
[L]uminous flux, lumen, lm = cd sr, cd sr. |
| luminous-intensity |
union |
The candela is the luminous intensity, in a given direction, of a source that
emits monochromatic radiation of frequency 540 × 1012 hertz and that has a
radiant intensity in that direction of 1/683 watt per steradian. |
| magnetic-field-strength |
union |
Derived unit expressed in terms of base units: A m^-1 |
| magnetic-flux |
union |
Derived unit expressed in terms of base units: kg m^2 s^-2 A^-1. [M]agnetic flux, weber, Wb = kg m^2 s^−2 A^−1, V s. |
| magnetic-flux-density |
union |
[M]agnetic flux density, tesla, T = kg s^−2 A^−1, Wb/m^2. |
| mass |
union |
The kilogram is the unit of mass; it is equal to the mass of the international
prototype of the kilogram. |
| mass-concentration |
union |
Derived unit expressed in terms of base units: kg m^-3 |
| mass-density |
union |
Derived unit expressed in terms of base units: kg m^3. |
| molar-energy |
union |
[M]olar energy, joule per mole. J mol^−1, kg m^2 s^−2 mol^−1. |
| molar-heat-capacity |
union |
[M]olar entropy, molar heat capacity, joule per mole kelvin, J K−1 mol−1, kg m^2 s^−2 mol^−1 K^−1. |
| moment-of-force |
union |
[M]oment of force, newton meter, N m, kg m^2 s^−2. |
| permeability |
union |
[P]ermeability, henry per meter, H m^−1, kg m s^−2 A^−2. |
| permittivity |
union |
[P]ermittivity, farad per meter, F m^−1, kg^−1 m^−3 s^4 A^2. |
| plane-angle |
union |
Derived unit expressed in terms of base units: 1. [v]alues of quantities with unit one, are expressed simply as numbers. [P]lane angle, radian, rad = m/m. |
| power |
union |
Derived unit expressed in terms of base units: kg m^2 s^-3. [P]ower, radiant flux, watt, W = kg m^2 s^−3 J/s. |
| pressure |
union |
Derived unit expressed in terms of base units: kg m^-1 s^2. [P]ressure, stress, pascal, Pa = kg m−1 s−2. |
| radiance |
union |
[R]adiance, watt per square meter, steradian W sr^−1 m^−2, kg s^−3. |
| radiant-intensity |
union |
[R]adiant intensity, watt per steradian, W sr^−1, kg m^2 s^−3. |
| refractive-index |
union |
Derived unit expressed in terms of base units: 1. [v]alues of quantities with unit one, are expressed simply as numbers. |
| relative-permeability |
union |
Derived unit expressed in terms of base units: 1. [v]alues of quantities with unit one, are expressed simply as numbers. |
| solid-angle |
union |
Derived unit expressed in terms of base units: 1. [V]alues of quantities with unit one, are expressed simply as
numbers. [S]olid angle, steradian, sr = m^2/m^2. |
| specific-energy |
union |
[S]pecific energy, joule per kilogram, J kg^−1, m^2 s^−2. |
| specific-heat-capacity |
union |
[S]pecific heat capacity, specific entropy, joule per kilogram kelvin, J K^−1 kg^−1, m^2 s^−2 K^−1. |
| specific-volume |
union |
Derived unit expressed in terms of base units: m^3 kg^-1 |
| surface-charge-density |
union |
[S]urface charge density, coulomb per square meter, C m^−2, A s m^−2. |
| surface-density |
union |
Derived unit expressed in terms of base units: kg m^-2. |
| surface-tension |
union |
[S]urface tension, newton per meter, N m^−1, kg s^−2. |
| temperature |
union |
Celsius temperature, degree Celsius, deg C = K. |
| thermal-conductivity |
union |
[T]hermal conductivity, watt per meter kelvin, W m^−1 K^−1, kg m s^−3 K^−1. |
| thermodynamic-temperature |
union |
The kelvin, unit of thermodynamic temperature, is the fraction 1/273.16 of the
thermodynamic temperature of the triple point of water. |
| time |
union |
The second is the duration of 9 192 631 770 periods of the radiation
corresponding to the transition between the two hyperfine levels of the ground
state of the caesium 133 atom. |
| velocity |
union |
A measure of the length of the path travelled by a physical body during a time
interval of 1 second. |
| volume |
union |
A measure of the total volume within the surface of a physical body |
| wavenumber |
union |
Derived unit expressed in terms of base units: m^−1. |