A.2 Derived SI Units

Quantity SI Unit Symbol Formula

activity of radionuclides

becquerel

Bq

s–1

capacitance

farad

F

C V–1

electric potential

volt

V

W A–1

electric resistance

ohm

Ω

V A–1

energy, work, quantity of heat

joule

J

N · s

force

newton

N

kg · m s–2

frequency

hertz

Hz

s–1

power, radiant flux

watt

W

J s–1

pressure

pascal

Pa

N m–2

quantity of electricity, electric charge

coulomb

C

A · s





acceleration

meter per second squared

m s–2


area

square meter

m2


density, mass

kilogram per cubic meter

kg m–3


entropy

joule per kelvin

J K–1


heat capacity

joule per kelvin

J K–1


molar energy

joule per mole

J mol–1


molar entropy

joule per mole-kelvin

J mol–1 K–1


specific energy

joule per kilogram

J kg–1


specific entropy

joule per kilogram-kelvin

J kg–1 K–1


specific volume

cubic meter per kilogram

m3 kg–1


specific-heat capacity

joule per kilogram-kelvin

J kg–1 K–1


surface tension

newton per meter

N m–1


velocity

meter per second

m s–1


viscosity, dynamic

pascal-second

Pa · s


viscosity, kinematic

square meter per second

m2 s–1


volume

cubic meter

m3


wavenumber

1 per meter

1 m–1