| Kilojoule |
Articles about Joule |
Information AboutKilojoule |
| CATEGORIES ABOUT JOULE | |
| si derived units | |
| units of energy | |
|
DEFINITION The joule is a derived unit defined as the work done or energy required, to exert a Force of one Newton for a distance of one Metre , so the same quantity may be referred to as a '''newton metre''' or '''newton-metre''' with the symbol '''N·m'''. However, the newton metre is usually used as a measure of Torque , not energy. As a rough guide, 1 joule is the absolute minimum amount of energy required (on the surface of Earth) to lift a one kilogram object up by a height of 10 centimetres. One joule is also:
CONVERSIONS 1 joule is exactly 107 Erg . 1 joule is approximately equal to:
Units defined in terms of the joule include:
HISTORY A joule is the mechanical equivalent of heat meaning the number of units of work which the unit of heat can perform. Its value was found by James Prescott Joule in experiments that showed the mechanical energy Joule's equivalent, and represented by the symbol J. The term was first introduced by Dr. Mayer of Heilbronn. SEE ALSO
REFERENCES
|
|
|