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mechanical equivalent of heat

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noun
  1. (in any system of physical units) the number of units of work or energy equal to one unit of heat, as 4.1858 joules, which equals one small calorie.
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Origin of mechanical equivalent of heat

First recorded in 1835–45
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
British Dictionary definitions for mechanical equivalent of heat

mechanical equivalent of heat

noun
  1. physics a factor for converting units of energy into heat units. It has the value 4.1868 joules per calorieSymbol: J
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Collins English Dictionary - Complete & Unabridged 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012