Erg

The erg is a unit of the CGS system of units for the sizes work (Greek: εργον ergon ), energy and heat ( unit symbol: erg ).

Or.

An Energy has the dimension

And therefore in the cgs system, the unit

The erg is the usual in the MCS -based SI units system legal unit joule ( but differs by a numerical factor ), and is sometimes still used in mechanics and often in astrophysics, although there since January 1, 1978 no longer legally is.

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