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Revision as of 16:52, 19 July 2003
The joule (J) is the SI unit of energy and work, and is defined as 1 kg m s = 1 N m = 1 W s. It is named in honour of the physicist James Prescott Joule.
The work required to lift 102 g (e.g. a small apple) for one metre under the earth's gravity is 1 joule.
- 1 joule = 0.239 calories.
See 1 E0 J for comparisons.
See also: conversion of units, eV, kWh, TWh