能量守恒定律

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测量热功当量个焦耳装置:紧系勒绳子向下移动个砝码会使得沉浸于水里的桨轮转动。

能量守恒定律(英语:law of conservation of energy)阐明,孤立系统个总能量 E 保持弗变。如果一个系统处于孤立环境,即弗能有任何能量或质量从该系统输入或输出。能量弗能无故生成,也弗能无故摧毁,但渠能够改变形式,例如,拉炸弹爆炸个过程中,化学能可以转化为动能[1][2]

参考文献[编辑]

  1. Janko, Richard. -{zh;zh-hans;zh-hant|Empedocles, "On Nature"}-. Zeitschrift für Papyrologie und Epigraphik. 2004, 150: 1–26. 
  2. William John Macquorn Rankine (1853) "On the General Law of the Transformation of Energy," Proceedings of the Philosophical Society of Glasgow, vol. 3, no. 5, pages 276-280; reprinted in: (1) Philosophical Magazine, series 4, vol. 5, no. 30, pages 106-117 (February 1853); and (2) W. J. Millar, ed., Miscellaneous Scientific Papers: by W. J. Macquorn Rankine, ... (London, England: Charles Griffin and Co., 1881), part II, pages 203-208: "The law of the Conservation of Energy is already known—viz. that the sum of all the energies of the universe, actual and potential, is unchangeable."