World Library  
Flag as Inappropriate
Email this Article
 

Erg

An erg (short for ergon, a Greek word meaning "work/task"[1]) is a unit of energy and mechanical work equal to 10−7 joules. It originated in the centimetre–gram–second (CGS) system of units, symbol "erg". It is not an SI unit.

An erg is the amount of work done by a force of one dyne exerted for a distance of one centimeter. In the CGS base units, it is equal to one gram centimeter-squared per second-squared (g·cm2/s2). It is thus equal to 10−7 joules or 100 nanojoules (nJ) in SI units. An erg is approximately the amount of work done (or energy consumed) by one common house fly performing one "push up", the leg-bending dip that brings its mouth to the surface on which it stands and back up.[2]

1 erg = 10−7 J = 100 nJ

1 erg = 10−10sn·m = 100 psn·m = 100 picosthène-metres

1 erg = 624.15 GeV = 6.2415×1011 eV

1 erg = 1 dyne cm = 1 g·cm2/s2

History

In 1864, Rudolf Clausius proposed the Greek word (ἐργον) ergon for the unit of energy, work and heat.[3][4] In 1873, a committee of the British Association for the Advancement of Science, including British physicists James Clerk Maxwell and William Thomson defined the C.G.S. System of Units, and recommended the name erg or ergon for the C.G.S. unit of energy.[5]

See also

References

  1. ^ Oxford English Dictionary
  2. ^ Filippenko, Alex, Understanding the Universe (of The Great Courses, on DVD), Lecture 44, time 24:30, The Teaching Company, Chantilly, VA, USA, 2007
  3. ^  
  4. ^ Howard, Irmgard K. (2001). "S is for Entropy. U is for Energy. What Was Clausius Thinking?". Journal of Chemical Education 78 (4): 505.  
  5. ^  
This article was sourced from Creative Commons Attribution-ShareAlike License; additional terms may apply. World Heritage Encyclopedia content is assembled from numerous content providers, Open Access Publishing, and in compliance with The Fair Access to Science and Technology Research Act (FASTR), Wikimedia Foundation, Inc., Public Library of Science, The Encyclopedia of Life, Open Book Publishers (OBP), PubMed, U.S. National Library of Medicine, National Center for Biotechnology Information, U.S. National Library of Medicine, National Institutes of Health (NIH), U.S. Department of Health & Human Services, and USA.gov, which sources content from all federal, state, local, tribal, and territorial government publication portals (.gov, .mil, .edu). Funding for USA.gov and content contributors is made possible from the U.S. Congress, E-Government Act of 2002.
 
Crowd sourced content that is contributed to World Heritage Encyclopedia is peer reviewed and edited by our editorial staff to ensure quality scholarly research articles.
 
By using this site, you agree to the Terms of Use and Privacy Policy. World Heritage Encyclopedia™ is a registered trademark of the World Public Library Association, a non-profit organization.
 



Copyright © World Library Foundation. All rights reserved. eBooks from World eBook Library are sponsored by the World Library Foundation,
a 501c(4) Member's Support Non-Profit Organization, and is NOT affiliated with any governmental agency or department.