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Conservation of energy   /kˌɑnsərvˈeɪʃən əv ˈɛnərdʒi/   Listen
noun
Conservation  n.  The act of preserving, guarding, or protecting; the keeping (of a thing) in a safe or entire state; preservation. "A step necessary for the conservation of Protestantism." "A state without the means of some change is without the means of its conservation."
Conservation of areas (Astron.), the principle that the radius vector drawn from a planet to the sun sweeps over equal areas in equal times.
Conservation of energy, or Conservation of force (Mech.), the principle that the total energy of any material system is a quantity which can neither be increased nor diminished by any action between the parts of the system, though it may be transformed into any of the forms of which energy is susceptible.


Energy  n.  (pl. energies)  
1.
Internal or inherent power; capacity of acting, operating, or producing an effect, whether exerted or not; as, men possessing energies may suffer them to lie inactive. "The great energies of nature are known to us only by their effects."
2.
Power efficiently and forcibly exerted; vigorous or effectual operation; as, the energy of a magistrate.
3.
Strength of expression; force of utterance; power to impress the mind and arouse the feelings; life; spirit; said of speech, language, words, style; as, a style full of energy.
4.
(Physics) Capacity for performing work. Note: The kinetic energy of a body is the energy it has in virtue of being in motion. It is measured by one half of the product of the mass of each element of the body multiplied by the square of the velocity of the element, relative to some given body or point. The available kinetic energy of a material system unconnected with any other system is that energy which is due to the motions of the parts of the system relative to its center of mass. The potential energy of a body or system is that energy which is not kinetic; energy due to configuration. Kinetic energy is sometimes called actual energy. Kinetic energy is exemplified in the vis viva of moving bodies, in heat, electric currents, etc.; potential energy, in a bent spring, or a body suspended a given distance above the earth and acted on by gravity.
Accumulation of energy, Conservation of energy, Correlation of energy, and Degradation of energy, etc. (Physics) See under Accumulation, Conservation, Correlation, etc.
Synonyms: Force; power; potency; vigor; strength; spirit; efficiency; resolution.





Collaborative International Dictionary of English 0.48


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"Conservation of energy" Quotes from Famous Books



... hypothesis of the same general order is due to the attention directed to the conception of energy, or capacity for work, by experimental discoveries of the possibility of reciprocal transformations without loss, of motion, heat, electricity, and other processes. The principle of the conservation of energy affirms the quantitative constancy of that which is so transformed, measured, for example, in terms of capacity to move units of mass against gravity. The exponents of what is called "energetics" have in many cases come to regard that ...
— The Approach to Philosophy • Ralph Barton Perry
... died by thousands from preventable causes, the physique, especially of women, is wonderfully improved, and the average longevity is already over sixty. "Our social structure, to be brief, is based on science, or the conservation of energy, as the Greek philosophers predicted. It was known to them that a certain amount of power would produce only a certain amount of work—that is, the weight of a clock in descending or a spring in uncoiling returns theoretically the amount of work expended in raising or coiling it, and in no possible ...
— A Journey in Other Worlds • J. J. Astor


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