Erg (unit): Difference between revisions
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imported>Paul Wormer No edit summary |
imported>Mark Widmer (Added comparison of 1 erg to heating water.) |
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In science, the '''erg''' is an obsolete unit of [[energy]]. It is part of the centimeter-gram-second system of units (cgs system) and defined as the work necessary to move a mass over 1 [[cm]] against a force of 1 [[dyne]]. The [[SI]] unit of energy is the [[joule]] (J). | In science, the '''erg''' is an obsolete unit of [[energy]]. It is part of the centimeter-gram-second system of units (cgs system) and defined as the work necessary to move a mass over 1 [[cm]] against a force of 1 [[dyne]]. The [[SI]] unit of energy is the [[joule]] (J). | ||
: 1 erg = 1 dyne cm = 1 g (cm/s)<sup>2</sup> = 10<sup>−7</sup> kg (m/s)<sup>2</sup> = 10<sup>−7</sup> J | : 1 erg = 1 dyne cm = 1 g (cm/s)<sup>2</sup> = 10<sup>−7</sup> kg (m/s)<sup>2</sup> = 10<sup>−7</sup> J | ||
An erg is an extremely small amount of energy. One erg would heat a 10-ounce (300 g) glass of water by only 0.1 ''billionths'' of a degree celsius. | |||
Revision as of 18:19, 30 October 2021
In science, the erg is an obsolete unit of energy. It is part of the centimeter-gram-second system of units (cgs system) and defined as the work necessary to move a mass over 1 cm against a force of 1 dyne. The SI unit of energy is the joule (J).
- 1 erg = 1 dyne cm = 1 g (cm/s)2 = 10−7 kg (m/s)2 = 10−7 J
An erg is an extremely small amount of energy. One erg would heat a 10-ounce (300 g) glass of water by only 0.1 billionths of a degree celsius.