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)
Planck constant (h)
Planck units
radiance
radiant flux
standard gravitational parameter (μ)
tesla (T)
Uhuru
watt (W)

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