Erg

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For other uses, see
Micro ERG
.

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

The erg is a unit of energy equal to 10−7 

SI unit. 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

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 = 1 dyn⋅cm = 1 g⋅cm2/s2
  • 1 erg = 2.77778×10−11 W⋅h

History

In 1864,

William Thomson recommended the general adoption of the centimetre, the gramme, and the second as fundamental units (C.G.S. System of Units). To distinguish derived units, they recommended using the prefix "C.G.S. unit of ..." and requested that the word erg or ergon be strictly limited to refer to the C.G.S. unit of energy.[4]

In 1922, chemist

surface chemistry.[6][7] It would equate to 10−14 erg,[5][8][9][10][11]
the equivalent to 10−21 joule.

The erg is not a part of the

better source needed], applications involving microscopic problems and relativistic electrodynamics,[15] and sometimes in mechanics[citation needed
].

See also

References

  1. ^ Goodell, Thomas Dwight (1889). The Greek in English (2nd ed.). Henry Holt and Company. p. 40.
  2. ^ Clausius, Rudolf (1867). "Appendices to Sixth Memoir [1864]. Appendix A. On Terminology.". In Hirst, T. Archer (ed.). The Mechanical Theory of Heat, With Its Applications to the Steam-engine and to the Physical Properties of Bodies. London: J. Van Voorst. p. 253. Retrieved 2014-03-17. editions:PwR_Sbkwa8IC.
  3. doi:10.1021/ed078p505
    . Retrieved 2014-03-17.
  4. Thomson, Sir W; Foster, Professor GC; Maxwell, Professor JC; Stoney, Mr GJ; Jenkin, Professor Fleeming; Siemens, Dr; Bramwell, Mr FJ (September 1873). Everett, Professor (ed.). First Report of the Committee for the Selection and Nomenclature of Dynamical and Electrical Units
    . Forty-third Meeting of the British Association for the Advancement of Science. Bradford: John Murray. p. 224. Retrieved 2014-03-17.
  5. ^
    OL 1351307M
    .
  6. ISBN 978-1-85233-043-9
    . 1447108051, 9781447108054. Retrieved 2015-08-25.
  7. ISBN 978-1-4471-1122-1
    .
  8. ^ Roberts, Lathrop Emerson; Harkins, William Draper; Clark, George Lindenberg (2013-07-01) [1922]. The Orientation of Molecules in Surfaces, Surface Energy, Adsorption, and Surface Catalysis. V. The Adhesional Work Between Organic Liquids and Water: Vaporization in Steps as Related to Surface Formation. University of Chicago. Retrieved 2015-08-25. {{cite book}}: |work= ignored (help)
  9. ^ Holmes, Harry N. (1925). Colloid Symposium Monograph - Papers Presented at the Second National Symposium on Colloid Chemistry, Northwestern University, June, 1924. Vol. 2. The Chemical Catalog Company, Inc. Retrieved 2015-02-15.
  10. ISSN 0002-7863
    . Retrieved 2015-02-15.
  11. Partington, James Riddick (2010-02-17) [1949]. An Advanced Treatise on Physical Chemistry: Fundamental principles. The properties of gases
    . Vol. 1. Longmans, Green. Retrieved 2015-08-25.
  12. ISBN 9781405192538
    .
  13. PMID 5078949
    .
  14. ^ "Are ergs commonly used in astrophysics? If so, is there a specific reason for it?". Physics Stack Exchange. 2016-02-12. Retrieved 2018-09-15.
  15. ISBN 978-0-471-30932-1
    .
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