| Revision as of 20:38, 14 February 2003 editMac (talk | contribs)23,294 editsmNo edit summary← Previous edit | Revision as of 20:39, 14 February 2003 edit undoMac (talk | contribs)23,294 editsmNo edit summaryNext edit → | ||
| Line 1: | Line 1: | ||
| ] | ] | ||
| The '''joule''' (J) is the ] unit of ] and work, and is defined as 1 ] ]<sup>2</sup> ]<sup>-2</sup> = 1 ] ] = 1 ] ]. It is named in honour of the physicist ]. | The '''joule''' (J) is the ] unit of ] and work, and is defined as 1 ] ]<sup>2</sup> ]<sup>-2</sup> = 1 ] ] = 1 ] ]. It is named in honour of the physicist ]. | ||
Revision as of 20:39, 14 February 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 is 1 joule.
- 1 joule = 0.239 calories.
See 1 E0 J for comparisons.
See also conversion of units, kWh.