JOUK
Jouk, v. i.
Defn: See Juke.
JOUL
Joul, v. t.
Defn: See Jowl.
JOULE
Joule, n. Etym: [From the distinguished English physicist, James P.
Joule.] (Physics.)
Defn: A unit of work which is equal to 107 units of work in the C. G. S. system of units (ergs), and is practically equivalent to the energy expended in one second by an electric current of one ampere in a resistance of one ohm. One joule is approximately equal to 0.738 foot pounds. Joule's equivalent. See under Equivalent, n.
JOULEMETER
Joule"me`ter, n.
Defn: An integrating wattmeter for measuring the energy in joules expended in an electric circuit or developed by a machine.
JOULE'S CYCLE
Joule's cycle. (Thermodynamics)
Defn: The cycle for the air engine proposed by Joule. In it air is taken by a pump from a cold chamber and compressed adiabatically until its pressure is eqal to that of the air in a hot chamber, into which it is then delivered, thereby displacing an equal amount of hot air into the engine cylinder. Here it expands adiabatically to the temperature of the cold chamber into which it is finally exhausted. This cycle, reversed, is used in refrigerating machines.