The Joule 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, i.e., one kilogram meter-squared per second-squared (kg·m²/s²). It is also a Watt-second. 10^{7} Ergs make a Joule. Referenced by: Cosmic Rays Energy Density Erg Foe GZK Limit Insolation Luminosity (L) Radiance Radiant Flux Uhuru |