60 s minute min 60 min hour h hr 24 h day d 3.141592653589793238462643383279 pi π (pi/180) rad arc_degree ° angular_degree degree arcdeg °/60 arc_minute ' ′ angular_minute arcminute arcmin '/60 arc_second " ″ angular_second arcsecond arcsec dm^3 liter L litre l 1000 kg metric_ton t tonne 1.60217733e-19 J electronvolt eV electron_volt 1.6605402e-27 kg unified_atomic_mass_unit u atomic_mass_unit atomicmassunit amu 1.495979e11 m astronomical_unit ua 1852 m nautical_mile nautical_mile/hour international_knot knot_international knot 1e-10 m angstrom ångström Å Å dam^2 are a 100 are hectare 100 fm^2 barn b 1000 hPa bar cm/s^2 gal 3.7e10 Bq curie Ci 2.58e-4 C/kg roentgen R cSv rem