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The joule (symbol: J) is the SI unit of energy, which is defined as the potential to do work. The joule has base units of kg·m²/s² = N·m. The base unit conversion can be remembered using the equation ''E = mc''2, where E is in joules, m is in kilograms, and c is the speed of light in meters per second.
Definition The joule is a derived unit defined as Joules 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 As a rough guide, 1 joule is the absolute minimum amount of energy required to lift a one kilogram object up by a height of 10 centimetres on the surface of Earth. One joule is also: Conversions 1 joule is exactly 107 ergs. 1 joule is approximately equal to: Also, some very rough approximations of a joule from the real world are: History A joule is the mechanical equivalent of heat meaning the number of units of work in 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. SI multiples See also | ||||||||
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