Astrophysics (Index)About

joule

(J)
(SI unit of energy)

The joule (J) is an SI (derived) unit of energy equivalent to the work done by the force of a newton (a unit of force) pushing over a meter distance. A joule is one kilogram meter-squared per second-squared (kg·m²/s²), a newton being the force necessary to accelerate a kilogram by one meter per second-squared. A joule is also a watt-second. 107 ergs make a joule.


(physics,unit,energy,SI)
Further reading:
http://en.wikipedia.org/wiki/joule

Referenced by pages:
cosmic rays (CR)
energy density
erg
electron volt (eV)
foe
GZK limit
ideal gas law
insolation
luminosity (L)
radiance
radiant flux
Uhuru
watt (W)

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