### 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.
10^{7} 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 units

radiance

radiant flux

Uhuru

watt (W)

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