Joule

The joule (J) is the SI unit of energy and work, and is defined as 1 kg m² s^-2 = 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

External link

• Conversion Calculator for Units of ENERGY (http://www.ex.ac.uk/cimt/dictunit/ccenrgy.htm)