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Research Article: Energy

Evan-Moor Publishing
This encyclopedia article consists of approximately 25 pages of information about Energy.
This section contains 7,379 words
(approx. 25 pages at 300 words per page)
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Energy

Energy, from the Greek energeia (en, in; ergon, work), originally a technical term in Aristotelian philosophy denoting "actuality" or "existence in actuality," means, in general, activity or power of action. In the physical sciences it is defined as the capability to do work, as accumulated work or, in the words of Wilhelm Ostwald, as "that which is produced by work or which can be transformed into work." Energy is measured in terms of units of work, to overcome a resisting force of one dyne over a distance of one centimeter. (The joule = 107 erg = the watt-second; the kilogram-meter = 9.81 × 107 erg. In atomic physics the unit is the electron volt; ev = 1.6 × 10−12 erg.

In physics, energy is either kinetic or potential. A body of mass m moving with a velocity v possesses, owing to its motion, the kinetic energy ½...

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This section contains 7,379 words
(approx. 25 pages at 300 words per page)
Purchase our Energy Encyclopedia Article
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