James Joules The physicist James Joules, after we we call after him the unit of work was the first to demonstrate that heat energy and mechanical energy are really equivalent.
物理学家，我们以他命名功的单位,他是第一个演示出,热能和机械能相等的人。
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A unit of energy, especially electrical energy, equal to the work done by one watt acting for one hour and equivalent to 3, '00 joules.