- Types:
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erg
a cgs unit of work or energy; the work done by a force of one dyne acting over a distance of one centimeter
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eV, electron volt
a unit of energy equal to the work done by an electron accelerated through a potential difference of 1 volt
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J, joule, watt second
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
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calorie, gram calorie, small calorie
unit of heat defined as the quantity of heat required to raise the temperature of 1 gram of water by 1 degree centigrade at atmospheric pressure
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Calorie, kilocalorie, kilogram calorie, large calorie, nutritionist's calorie
a unit of heat equal to the amount of heat required to raise the temperature of one kilogram of water by one degree at one atmosphere pressure; used by nutritionists to characterize the energy-producing potential in food
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B.Th.U., BTU, British thermal unit
a unit of heat equal to the amount of heat required to raise one pound of water one degree Fahrenheit at one atmosphere pressure; equivalent to 251.997 calories
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therm
a unit of heat equal to 100,000 British thermal units
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watt-hour
a unit of energy equal to the power of one watt operating for one hour
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B.T.U., Board of Trade unit, kW-hr, kilowatt hour
a unit of energy equal to the work done by a power of 1000 watts operating for one hour
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foot-pound
a unit of work equal to a force of one pound moving through a distance of one foot
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foot-ton
2240 foot-pounds
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foot-poundal
a unit of work equal to a force of one poundal moving through a distance of one foot
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horsepower-hour
a unit of work equal to the work done by one horsepower in one hour
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kilogram-meter
a unit of work equal to the work done by a one kilogram force operating through a distance of one meter