Word of the Day
Erg (urg)
· Common clues: Energy bit; Joule fraction; Amount of work
· Crossword puzzle frequency: 6 times a year
· Frequency in English language: 62313 / 86800
An erg is the unit of energy and mechanical work in the centimetre-gram-second (CGS) system of units, symbol "erg". Its name is derived from the Greek word meaning "work".
The erg is a quite small unit, equal to the force of one dyne exerted for a distance of one centimetre. In the cgs base units, it is equal to one gram-square centimetre per second squared (g·cm2/s2). It is thus equal to 1 × 10-7 joules or 0.1 microjoule (µJ) in SI units.
An
erg is roughly the kinetic energy of a slow-flying mosquito, or
about the energy of one flea jump.
This article is licensed under the GNU Free Documentation License. It uses material from the Wikipedia article "Erg".
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