| 单词 | watt-second |
| 释义 | > as lemmaswatt-second watt-second n. a unit of energy equal to that produced in one second by a power of one watt (equal to one joule); symbol Ws. ΘΚΠ the world > matter > physics > electromagnetic radiation > electricity > electrical power, electricity > [noun] > joule joule1882 coulomb-volt1893 watt-second1893 wattsec1962 1886 Telegr. Jrnl. & Electr. Rev. 6 Aug. 154/1 I notice in your correspondence columns the expression, ‘number of foot-pounds in a watt’. It should be, ‘in a watt-second or joule’. 1981 Sci. Amer. Dec. 53/1 A photon with a frequency in the visible region of the electromagnetic spectrum has little energy: less than 10−19 joule, or watt-second. 2009 B. Stoppee & J. Stoppee Guide Photogr. & Light xiii. 384/2 Prepare to shell out a few dollars for the big 2,000 watt-second pack. < as lemmas |
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