| Revision as of 19:01, 20 August 2003 editTarquin (talk | contribs)14,993 editsNo edit summary← Previous edit | Revision as of 15:13, 31 August 2003 edit undoEdH (talk | contribs)Extended confirmed users4,607 editsmNo edit summaryNext edit → | ||
| Line 5: | Line 5: | ||
| 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 ]. | ||
| The work required to lift ] (e.g. a small apple) for one metre under the earth's gravity is 1 joule. | The work required to lift a mass of ] (e.g. a small apple) for one metre under the earth's gravity is 1 joule. | ||
| 1 joule is equal to: | 1 joule is equal to: | ||
Revision as of 15:13, 31 August 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 a mass of 102 g (e.g. a small apple) for one metre under the earth's gravity is 1 joule.
1 joule is equal to:
- 0.000,000,278 Kilowatt-hours
- 0.239 calories
- 0.000,948 British thermal units
- 0.738 foot pounds force
- 1 Ws (Watt second)
- 1 Nm (Newton metre)
- 23.7 foot poundals
- 10,000,000 ergs
See 1 E0 J for further comparisons.
See also: conversion of units, eV, kWh, TWh