Units in CAPA and LON-CAPA


BASE UNITS

unit

symbol

dimension

meter

m

length

kilogram

kg

mass

second

s

time

ampere

A

electric current

kelvin

K

temperature

mole

mol

number of molecules

candela

cd

luminous intensity


PREFIXES

Prefix symbol factor
yotta Y 1024
zetta Z 1021
exa E 1018
peta P 1015
tera T 1012
giga G 109
mega M 106
kilo k 103
hecto h 102
deci d 10-1
centi c 10-2
milli m 10-3
micro nano 10-6
nano n 10-9
pico p 10-12
femto f 10-15
atto a 10-18
zepto z 10-21
yocto y 10-24

DERIVED UNITS

gram g 0.001 kg mass
pound lb 0.4536 kg mass
ounce oz 1.772E-3 kg mass
hour hr 3600 sec time
inch in 2.54 cm length
foot ft 12.0 in length
mile mi 5280 ft length
yard yd 0.9144 m length
nautical mile n_mi 6080 ft length
astroUnit AU 1.496E11 m length
rood rood 1210 yd^2 area
acre acre 4840 yd^2 area
hertz Hz s^{-1} frequency
litre L 10^3 cm^3 volume
newton N m*kg/s^2 force
pound lb 4.44822 N force
dyne dyn 1.0E-5 N force
pascal Pa N/m^2 pressure, stress
bar bar 1.0E5 Pa pressure
mm of Mercury mmHg 1.3332 Pa pressure
torr torr 1.0 mmHg pressure
atmmosphere atm 760 torr pressure
joule J N*m energy
electron volt eV 1.6022E-19 J energy
calorie cal 4.1868 J energy
Btu Btu 1.0551 J energy
watt W J/s power
coulomb C A*s charge
volt V J/C electric potential
ohm Ohm V/A electric resistance
siemens S 1/Ohm electric conductance
farad F C/V electric capacitance
tesla T V*s/m^2 magnetic field
weber Wb V*s magnetic flux density
henry H V*s/A inductance
radian rad none planar angle
degree deg p/180 rad planar angle
steradian sr none solid angle
lumen lm cd*sr luminous flux
lux lx cd*sr/m^2 illuminance
becquerel Bq 1/s activity (activity)
gray Gy J/kg absorbed dose (of radiation)
sievert Sv J/kg dose equivalent (of radiation)