energy
summary
https://en.wikipedia.org/wiki/Units_of_energy
systems
system international
joule: 1 joule = kg * meters^2 * seconds^-2
# energy, work, heat
1 Joule = (1 kg) ("299,792,458 m/s" ^ 2)
E = (mass) ("speed of light" ^ 2)
watt: 1 watt = kg * meters^2 * seconds^-3
# power, radiant flux
capacity
volt: 1 volt = kg * m^2 * seconds^-3 * amperes^-1
# electrical potential, voltage, EMF
coulomb:
electrical charge
amp:
1 amp = 1 coulomb
= 6.241509074 × 10^18 electrons' worth of charge
US customary
foot pound:
1 foot-pound force = 1.355818 joules
= 0.0003240482791586998 food calories
1 food calorie =
food calories
calories:
# replaced by joules mostly
caloric theory of heat:
https://en.wikipedia.org/wiki/Calorie#Food_energy
{
large calorie,
food calorie,
dietary calories,
kilogram calorie,
kcal
}
originally defined as the amount of heat needed
to raise the temperature of one kilogram of
water by one degree celsius.
1 food calorie = 1 kcal
1 food calorie = 4184 joules
1 food calorie = 1000 small calories