Expressed In Terms Of SI Derived Units With Special Names

SI Derived Units

Expressed in Terms of SI Derived Units with Special Names

Derived quantity	Quantitysymbol	Name	Expression in SI base units	Alternative SI expressions
angular velocity	ω	radian per second	s-1	rad s-1
angular acceleration	α	radian per second squared	s-2	rad s-2
angular momentum	L	joule second	kg m2 s-1	J s
momentum	P	newton second	kg m s-1	N s
dynamic viscosity	η	pascal second	kg m-1s-1	Pa s
surface tension	γ, σ	newton per metre	kg s-2	N m-1 = J m-2
moment of force	υ	newton metre	kg m2 s-2	N m = J
heat flux density, irradiance	Q	watt per square metre	kg s-3	W m-2
heat capacity, entropy	S	joule per kelvin	kg m2 s-2 K-1	J K-1 = C V K-1
specific heat capacity, specific entropy	c	joule per kilogram kelvin	m2 s-1 K-1	J kg-1 K-1
specific energy	E	joule per kilogram	m2 s-2	J kg-1
thermal conductivity	λ	watt per metre kelvin	kg m2 s-3 K-1	W m-1 K-1
electric conductivity	σ, κ	siemens per metre	A2 s3 kg-1 m-3	S m-1 = Ω-1 m-1= A V-1 m-1
electric resistivity	ρ	ohm metre	kg m3 A-2 s-3	Ω m = m S-1= V m A-1
energy density	u	joule per cubic metre	kg m-1 s-2	J m-3 = N m-2= C m-3
electric field strength	E	volt per metre	kg m s-3 A-1	V m-1
electric charge density	ρ	coulomb per cubic metre	A s m-3	C m-3
electric flux density	σ	coulomb per square metre	A s m-2	C m-2
permittivity	ε	farad per metre	A2 s4 kg-1 m-3	F m-1
permeability	μ	henry per metre	kg m s-2 A-2	H m-1
molar energy	Um, Hm, etc.	joule per mole	kg m2 s-2 mol-1	J mol-1
molar entropy, molar heat capacity	Sm, Cc,m, Cp,m	joule per mole kelvin	kg m2 s-2 mol-1 K-1	J mol-1 K-1
exposure(x and γ rays)	-	coulomb per kilogram	A s kg-1	C kg-1
absorbed dose rate	-	gray per second	m2 s-3	Gy s-1 = J kg-1 s-1
radiant intensity	P'	watt per steradian	kg m2 s-3 sr-1	W sr-1
radiance	L	watt per square metre steradian	kg s-3 sr-1	W m-2 sr-1
catalytic (activity) concentration	-	katal per cubic metre	mol m-3 s-1	kat m-3

Table 5. SI derived units expressed in terms of SI derived units with special names.

The above table shows some derived quantities and units expressed in terms of SI units with special names. Some derived quantities like moment of force (newton metre) and thermodynamic energy (joule) are both quantities of energy (kg m2 s-2) but are very often expressed differently. Si Units:

SI Base Units

SI Derived Units

expressed with special names

expressed in terms of SI base units

expressed in terms in terms of SI units with special names

SI Unit Prefixes

Non-SI Units

accepted by SI

currently accepted by SI

derived CGS units with special names

other non-SI units

Constants

Glossary of Units

CONVERSION CALCULATORS

Convert between Different Units of Measurement

Index of Unit Converters

ACCELERATION

ANGLE

AREA

AREA DENSITY

DENSITY

DISTANCE

DYNAMIC VISCOSITY

ENERGY

ENERGY DENSITY

ENTROPY

FEED RATE

FLOW RATE

FORCE

FUEL CONSUMPTION

HEAT CAPACITY

HEAT FLUX DENSITY

HEAT TRANSFERCOEFFICIENT

IRRADIANCE

KINEMATIC VISCOSITY

LENGTH

MASS

POWER

PRESSURE

SPECIFIC ENERGY

SPECIFIC ENTHALPY

SPECIFIC ENTROPY

SPECIFIC HEATCAPACITY

SPECIFIC VOLUME

SPEED

TEMPERATURE

THERMAL CONDUCTIVITY

TIME

TORQUE

VELOCITY

VOLUME

VOLUMETRIC HEAT CAPACITY

Unit Prefixes

PlasmaGas Flow

HardnessMPa - GPa

ComputingBits and Bytes

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