Astrophysics (Index)About

joule

(J)
(SI unit of energy)

The joule (J) is an SI (derived) unit of energy equivalent to the work done by the force of a newton (a unit of force) pushing over a meter distance. A joule is one kilogram meter-squared per second-squared (kg·m²/s²), a newton being the force necessary to accelerate a kilogram one meter per second-squared. This is very roughly the energy to lift (in Earth surface gravity) a pound weight 9 inches, or a kg weight 10 cm. A joule is also a watt-second. 107 ergs make a joule.


(physics,unit,energy,SI)
Further reading:
https://en.wikipedia.org/wiki/joule
https://www.britannica.com/science/joule
https://energyeducation.ca/encyclopedia/Joule
https://www.theochem.ru.nl/~pwormer/Knowino/knowino.org/wiki/Joule_(unit).html
https://www.bipm.org/en/publications/si-brochure

Referenced by pages:
cosmic rays (CR)
electron volt (eV)
energy
energy density
erg
foe
gravitational constant (G)
GZK limit
ideal gas law
insolation
luminosity (L)
Planck constant (h)
Planck units
radiant flux
Rydberg unit
solar luminosity (LSun)
standard gravitational parameter (μ)
tesla (T)
Uhuru
watt (W)

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