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joule, J
1. A metric unit of energy or work; one joule per second equals one watt or 0.737 foot-pounds; one Btu equals 1,055 joules.
2. An SI unit of work and energy, replacing the calorie (one joule equals 4.2 calories).
2. An SI unit of work and energy, replacing the calorie (one joule equals 4.2 calories).
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