28. Units of Physical Quantities
Names and symbols of certain quantities
A, ampere
H, henry
Oe, oersted
a.m.u., atomic
h, hour
Q, ohm
mass unit
Hz, hertz
P, poise
B, bel
7, joule
Pa. pascal
b, barn
K, kelvin
rad, radian
C, coulomb
1, litre
S, siemens
cd, candela
lm, lumen
s, second
D, diopter
lx, lux
sr, steradian
dyn, dyne
m, metre
St, stokes
eV, electron-volt
min, minute
T, tesla
F, farad
mol, mole
V, volt
G, gauss
Mx, maxwell
W, watt
g, gram
N, newton
Wb, weber
Decimal Prefixes
Factor
Name of prefix
Symbol
Factor
Name of prefix
Symbol
1012
teraT
10-2
centic
109
gigaG
10-3
millim
106
megaM
10-6
micro11
103
kilok
10-9
nanon
102
hectoh
10-12
picop
10
decada
10-15
femtof
10-1
decid
10-18
attoa
SI and CGS Units
Physical quantity
Name of unit
Conversion factor
1 SI unit/1 CGS unit
SI
CGS
Length
m
cm
100
Time
s
s
1
Velocity
m/s
cm/s
100
Acceleration
m/s2
cm/s2
100
Oscillation frequency
Hz
Hz
1
Angular velocity
rad/s
rad/s
1
Angular frequency
s -1
s-1
1
Mass
kg
g
103
Density
kg/m3
g/cm3
10-3
Force
N
dyn
105
381