Erg

erg
Unit systemCGS units
Unit ofenergy
Symbolerg
Derivation1 erg = 1 dyn⋅cm
Conversions
1 erg in ...... is equal to ...
   CGS base units   1 cm2⋅g⋅s−2
   SI units   10−7 J
   British Gravitational System   7.375621×10−8 ft⋅lbf

The erg is a unit of energy equal to 10−7 joules (100 nJ). It is not an SI unit, instead originating from the centimetre–gram–second system of units (CGS). Its name is derived from ergon (ἔργον), a Greek word meaning 'work' or 'task'.[1]

An erg is the amount of work done by a force of one dyne exerted for a distance of one centimetre. In the CGS base units, it is equal to one gram centimetre-squared per second-squared (g⋅cm2/s2). It is thus equal to 10−7 joules or 100 nanojoules (nJ) in SI units.

  • 1 erg = 10−7 J = 100 nJ
  • 1 erg = 10−10 sn⋅m = 100 psn⋅m = 100 picosthène-metres
  • 1 erg = 624.15 GeV = 6.2415×1011 eV
  • 1 erg = dyn⋅cm = 1 g⋅cm2/s2
  • 1 erg = 2.77778×10−11 W⋅h
  1. ^ Goodell, Thomas Dwight (1889). The Greek in English (2nd ed.). Henry Holt and Company. p. 40.

Erg

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