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**h**: one hour = 3600 s
**min**: one minute = 60 s
**m**: meter
**g**: one gram = 1e-3 kg
**s**: second
**A**: ampere
**K**: kelvin
**mol**: mole
**cd**: candela
**Hz**: one hertz = 1 s^-1
**N**: newton
**Pa**: pascal
**J**: joule
**W**: watt
**C**: coulomb
**V**: volt
**ohm**: ohm; variant: **Ohm**
**S**: Siemens (the inverse of one ohm)
**F**: farad (the electric capacity unit, not the faraday)
**T**: tesla
**Wb**: weber
**H**: henry
**lm**: lumen (1 lumen = 1 lux)
**lx**: lux
**Bq**: becquerel (1 Bq = 1 Hz)
**Gy**: gray
**Sv**: sievert
**rad**: radian (1 rad = 1 no_unit, where no_unit has the units exponents { 0, 0, 0, 0, 0, 0, 0})
**sr**: steradian (1 sr = 1 no_unit)
*nothing*: no_unit; a number with no unit can be considered as written in radian for example
**°**: angular degree (1° = pi/180)
**'**: angular minute (1' = pi/10800)
**''**: angular second (1'' = pi/648000)
**tr**: turn (1 tr = 2*pi)
**rpm**: revolution per minute (1 rpm = pi/30 Hz)
**b**: barn (1b = 1e-28 m^2)
**a**: are (1a = 100 m^2)
**L**: liter
**t**: ton (1 ton = 1e3 kg)
**bar**: bar (1 bar = 1e5 Pa)
**eV**: electron-volt (1eV = 1.60218e-19 J)
**uma**: atomic mass unit (1 uma = 1.66054e-27 kg)
**°A**: ångström (1 ångström = 1e-10 m)
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