“British thermal unit”的概念、定义、翻译、参考文献-科学参考

单词	British thermal unit
释义	British thermal unit [`brid·ish `thǝr·mǝl ´yü·nǝt] ^{THERMODYNAMICS} 1. Abbreviated Btu. 2. A unit of heat energy equal to the heat needed to raise the temperature of 1 pound of air-free water from 60° to 61°F at a constant pressure of 1 standard atmosphere; it is found experimentally to be equal to 1054.5 joules. Also known as sixty degrees Fahrenheit British thermal unit (Btu_60/61). 3. A unit of heat energy that is equal to 1/180 of the heat needed to raise 1 pound of air-free water from 32°F (0°C) to 212°F (100°C) at a constant pressure of 1 standard atmosphere; it is found experimentally to be equal to 1055.79 joules. Also known as mean British thermal unit (Btu_mean). 4. A unit of heat energy whose magnitude is such that 1 British thermal unit per pound equals 2326 joules per kilogram; it is equal to exactly 1055.05585262 joules. Also known as international table British thermal unit (Btu_IT).
随便看	hammerhead hammerhead crane hammerless gun hammer mill hammer milling hammer pick hammer test hammertoe hammer track hammer welding Hammett acidity function Hamming code hamming distance hammock Hamoproteidae hamper Hampson process ham radio hamster hamstring muscles hamulus hamus hancockite Hancock jig hand

科学参考收录了103327条科技类词条，基本涵盖了常见科技类参考文献及英语词汇的翻译，是科学学习和研究的有利工具。