any division of quantity accepted as a standard of measurement or exchange

a cgs unit of work or energy; the work done by a force of one dyne acting over a distance of one centimeter

a unit of energy equal to the work done by an electron accelerated through a potential difference of 1 volt

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

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

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