| 单词 | thermal unit |
| 释义 | > as lemmasthermal unit thermal unit n. a unit of heat; cf. British thermal unit n. at British adj. and n. Compounds 2. ΘΚΠ the world > matter > physics > electromagnetic radiation > heat > [noun] > unit of heat thermal unit1853 calorie1863 British thermal unit1865 joule1882 large calorie1884 therm1888 kilogram calorie1892 B.T.U.- the world > matter > properties of materials > temperature > heat > [noun] > measurement of heat > unit of thermal energy thermal unit1853 calorie1863 British thermal unit1865 joule1882 therm1888 1853 Trans. Royal Soc. Edinb. 20 170 The mechanical equivalent of the ordinary thermal unit. 1876 Catal. Special Loan Coll. Sci. Apparatus S. Kensington Mus. §1056 The heat is calculated as follows, either in calories or British thermal units. 1910 Encycl. Brit. XIII. 137/1 English Engineers usually state results in terms of the British Thermal Unit (B. Th. U.). 1943 Gloss. Terms Electr. Engin. (B.S.I.) 14 A B.t.u. is equivalent to 1054 joules. 1955 Sci. Amer. July 58/1 Coal supplied only 34 per cent of the nation's total B.T.U.'s (British thermal units). 1964 H. S. Hvistendahl Engin. Units vii. 110 The legal definition of the Btu is the amount of heat required to raise 1lb of water from 60 to 61°F at standard atmospheric pressure. < as lemmas |
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