Joule - Law Dictionary Search Results
Home Dictionary Name: joulejoule
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 1000167 times the absolute joule The absolute joule is approximately equal to 0737562 foot pounds 0239006 gram calories small calories and 372506 x 10 7 horsepower hours and 0000948451 Btu...
Erg
The unit of work or energy in the C G S system being the amount of work done by a dyne working through a distance of one centimeter the amount of energy expended in moving a body one centimeter against a force of one dyne 981 dynes exert the same force as a one gram mass in the earths gravitational field One foot pound is equal to 13560000 ergs The absolute Joule is equivalent to 107 ergs which are equivalent to 02389 gram calories at 15deg C See also mechanical equivalent of heat under equivalent...
Joules cycle
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...
electron volt
a unit of energy being equal to the kinetic energy acquired by an electron when accelerated through a potential difference of one volt It is equal to 1602 x 10 19 Joules It is abbreviated eV...
Joul
See Jowl...
Joulemeter
An integrating wattmeter for measuring the energy in joules expended in an electric circuit or developed by a machine...
Joules law
The law that the rate at which heat is produced in any part of an electric circuit is measured by the product of the square of the current times the resistance of that part of the circuit If the current i is constant for an interval of time t the energy H in heat units equals i2Rt R being resistance...
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