| 单词 | mechanical equivalent of heat |
| 释义 | mechanical equivalent of heat Symbol J. The ratio of a unit of mechanical energy to the equivalent unit of thermal energy, when a system of units is used in which they differ. J has the value 4.1868 × 107 ergs per calorie. The concept loses its usefulness in SI units in which all forms of energy are expressed in joules and J therefore has a value of 1 |
| 随便看 |
|
物理辞典收录了3346条物理词条，基本涵盖了常用物理知识及物理英语单词词组的翻译及用法，是物理学习的有利工具。