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joule /ˈʤu(ə)l ||&dɪvɪdɛ;ˈʤaʊ(ə)l/

焦耳

joule /ˈʤu(ə)l/ 名詞

joule n. Physics. A unit of work which is equal to 10⁷ ergs (the unit of work in the C. G. S. system of units), and is equivalent to one watt-second, the energy expended in one second by an electric current of one ampere in a resistance of one ohm; also called the absolute joule. It is abbreviated J or j. The international joule is slightly larger, being 1.000167 times the absolute joule. The absolute joule is approximately equal to 0.737562 foot pounds, 0.239006 gram-calories (small calories), and 3.72506 x 10⁻⁷ horsepower-hours, and 0.000948451 B.t.u. --*HCP61*

**Joule's equivalent**. See under Equivalent, n.

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From: WordNet (r) 2.0

joule

n 1: a unit of electrical energy equal to the work done when a

current of one ampere passes through a resistance of one

ohm for one second [syn: J, watt second]

2: English physicist who established the mechanical theory of

heat and discovered the first law of thermodynamics

(1818-1889) [syn: James Prescott Joule]