Joule

joule
Unit systemSI
Unit ofenergy
SymbolJ
Named afterJames Prescott Joule
Conversions
1 J in ...... is equal to ...
   SI base units   kgm2s−2
   CGS units   1×107 erg
   watt-seconds   1 Ws
   kilowatt-hours   2.78×10−7 kW⋅h
   kilocalories (thermochemical)   2.390×10−4 kcalth
   BTUs   9.48×10−4 BTU
   electronvolts   6.24×1018 eV

The joule (pronounced /ˈl/, JOOL or /ˈl/ JOWL; symbol: J) is the unit of energy in the International System of Units (SI).[1] It is equal to the amount of work done when a force of one newton displaces a mass through a distance of one metre in the direction of that force. It is also the energy dissipated as heat when an electric current of one ampere passes through a resistance of one ohm for one second. It is named after the English physicist James Prescott Joule (1818–1889).[2][3][4]

  1. ^ International Bureau of Weights and Measures (2006), The International System of Units (SI) (PDF) (8th ed.), p. 120, ISBN 92-822-2213-6, archived (PDF) from the original on 2021-06-04, retrieved 2021-12-16
  2. ^ American Heritage Dictionary of the English Language, Online Edition (2009). Houghton Mifflin Co., hosted by Yahoo! Education.
  3. ^ The American Heritage Dictionary, Second College Edition (1985). Boston: Houghton Mifflin Co., p. 691.
  4. ^ McGraw-Hill Dictionary of Physics, Fifth Edition (1997). McGraw-Hill, Inc., p. 224.

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