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) |