Measurement and SI Unit

Measurement & SI Units of Physical Base Quantities:

Base quantitySymbolSI unitsSymbol/ dimension
Lengthlmetre (m)L
Massmkilogram (kg)M
Timetsecond (s)T
Electric currentIampere (A)I
TemperatureTkelvin (K)Θ
Amount of substancenmole (mol)N
Luminous intensityLcandela (cd)J

 

Measurement & SI Units of Physical Derived Quantities:

Derived quantitySymbolSI unitsDimension
Plane angleθradian (rad)1
Solid angleΩsteradian (sr)1
Absorbed dose rate Gy s−1L2 T−3
Accelerationa→m s−2L T−2
Angular accelerationαrad s−2T−2
Angular speed (orangular velocity)ωrad s−1T−1
Angular momentumLkg m2 s−1M L2 T−1
AreaAm2L2
Area densityρAkg m−2M L−2
CapacitanceCfarad (F = A2 s4 kg−1m−2)I2 T4 M−1 L−2
Catalytic activity katal (kat = mol s−1)N T−1
Catalytic activity concentration kat m−3N L−3 T−1
Chemical potentialμJ mol−1M L2 T−2 N−1
Molar concentrationCmol m−3N L−3
Cracklec→m s-5L T-5
Current densityJ →A m−2I L−2
Dose equivalentHsievert (Sv = m2 s−2)L2 T−2
Dynamic ViscosityηPa sM L−1 T−1
Electric ChargeQcoulomb (C = A s)I T
Electric charge densityρQC m−3I T L−3
Electric displacementDC m−2I T L−2
Electric field strengthE→V m−1M L T−3 I−1
Electrical conductanceGsiemens (S = A2 s3 kg−1 m−2)L−2 M−1 T3 I2
Electric potentialVvolt (V = kg m2 A−1 s−3)L2 M T−3 I−1
Electrical resistanceRohm (Ω = kg m2 A−2 s−3)L2 M T−3 I−2
EnergyEjoule (J = kg m2 s−2)M L2 T−2
Energy densityρEJ m−3M L−1 T−2
EntropySJ K−1M L2 T−2 Θ−1
ForceF→newton (N = kg m s−2)M L T−2
Fuel efficiencympgfuel efficiency (mpg = m m−3M M−3
Impulsep→kg m s−1M L T−1
Frequencyfhertz (Hz =s−1)T−1
Half-lifet1/2sT
HeatQJM L2 T−2
Heat capacityCpJ K−1M L2 T−2 Θ−1
Heat flux densityϕQW m−2M T−3
IlluminanceEvlux (lx = cd sr m−2)J L−2
ImpedanceZohm (Ω = kg m2 A−2 s−3)L2 M T−3 I−2
Index of refractionn 1
InductanceLhenry (H = kg m2 A−2s−2)M L2 T−2 I−2
IrradianceEW m−2M T−2
IntensityIW m−2M T−2#
Jerkj→m s-3L T-3
Jounces→m s-4L T-4
Linear densityρl M L−1
Luminous flux (orluminous power)Flumen (lm = cd sr)J
Mach Number (ormach)MUnitless (M = u/c)1
Magnetic field strengthHA m−1I L−1
Magnetic fluxΦweber (Wb = kg m2 A−1 s−2)M L2 T−2 I−1
Magnetic flux densityBtesla (T = kg A−1 s−2)M T−2 I−1
MagnetizationMA m−1I L−1
Mass fractionxkg/kg1
(Mass) Density(volume density)ρkg m−3M L−3
Mean lifetimeτsT
Molar energy J mol−1M L2 T−2 N−1
Molar entropy J K−1 mol−1M L2 T−2 Θ−1 N−1
Molar heat capacitycJ K−1 mol−1M L2 T−2 N−1
Moment of inertiaIkg m2M L2
Momentump→N sM L T−1
PermeabilityμH m−1M L T−2 I−2
PermittivityεF m−1I2 M−1 L−3 T4
PowerPwatt (W)M L2 T−3
Pressureppascal (Pa = kg m−1 s−2)M L−1 T−2
Popp→m s-6L T-6
(Radioactive) ActivityAbecquerel (Bq = s−1)T−1
(Radioactive) DoseDgray (unit) (Gy = m2 s−2)L2 T−2
RadianceLW m−2 sr−1M T−3
Radiant intensityIW sr−1M L2 T−3
Reaction ratermol m−3 s−1N L−3 T−1
Speedvm s−1L T−1
Specific energy J kg−1L2 T−2
Specific heat capacitycJ kg−1 K−1L2 T−2 Θ−1
Specific volumevm3 kg−1L3 M−1
SpinSkg m2 s−1
Ratings
Review Date
Reviewed Item
SI Units of Physics
Reviewer Rating
51star1star1star1star1star
Print Friendly, PDF & Email