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nounEnglish physicist who established the mechanical theory of heat and discovered the first law of thermodynamics (1818-1889)
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nouna 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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Definition that contains joule
- r (physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole
- power (physics) the rate of doing work; measured in watts (= joules/second)
- h the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
- energy (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs
- w a unit of power equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm
- gray the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad
- watt a unit of power equal to 1 joule per second; the power dissipated by a current of 1 ampere flowing across a resistance of 1 ohm
- gy the SI unit of energy absorbed from ionizing radiation; equal to the absorption of one joule of radiation energy by one kilogram of matter; one gray equals 100 rad
- planck's constant the constant of proportionality relating the energy of a photon to its frequency; approximately 6.626 x 10^-34 joule-second
- free energy (physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs