− | 这个公式没有提到热,没有提到温度,甚至没有提到熵,也不一定隐含地依赖于这些概念,但它暗示了第二定律的内容。一个密切相关的表述为,“摩擦力从来不做正功。”<ref>[[Clifford Truesdell|Truesdell, C.]], Muncaster, R.G. (1980). ''Fundamentals of Maxwell's Kinetic Theory of a Simple Monatomic Gas, Treated as a Branch of Rational Mechanics'', Academic Press, New York, p. 15.</ref>普朗克写道: “摩擦生热是不可逆的。”<ref>Max Planck|Planck, M. (1897/1903), p. 81.</ref><ref>Max Planck|Planck, M. (1926), p. 457, Wikipedia editor's translation.</ref> | + | 这个公式没有提到热,没有提到温度,甚至没有提到熵,也不一定隐含地依赖于这些概念,但它暗示了第二定律的内容。一个密切相关的表述为,“摩擦力从来不做正功。”<ref>Clifford Truesdell, Muncaster, R.G. (1980). ''Fundamentals of Maxwell's Kinetic Theory of a Simple Monatomic Gas, Treated as a Branch of Rational Mechanics'', Academic Press, New York, p. 15.</ref>普朗克写道: “摩擦生热是不可逆的。”<ref>Max Planck(1897/1903), p. 81.</ref><ref>Max Planck (1926), p. 457, Wikipedia editor's translation.</ref> |
| ===Statement for a system that has a known expression of its internal energy as a function of its extensive state variables 一个其内能有已知表达式(其扩展状态变量的函数)的系统的表述=== | | ===Statement for a system that has a known expression of its internal energy as a function of its extensive state variables 一个其内能有已知表达式(其扩展状态变量的函数)的系统的表述=== |