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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



... prime motors and similar structures, the number expressing the ratio between energy absorbed by the device, and useful, not necessarily available, work obtained from it. It is equal to work obtained divided by energy absorbed, and is necessarily a fraction. If it exceeded unity the doctrine of the conservation of energy would not be true. The economic coefficient expresses the efficiency, q. v., of any machine, and of efficiencies there are several kinds, to express any one of which the economic coefficient may be used. Thus, let W—energy absorbed, and w work produced ; then ...
— The Standard Electrical Dictionary - A Popular Dictionary of Words and Terms Used in the Practice - of Electrical Engineering • T. O'Conor Slone
... The sources of heat, light, and power. The law of the conservation of energy expresses the fundamental likeness of heat, light, and power. The principal sources from which man derives these agencies are coal and falling waters, tho wood is of importance as fuel in some localities. About 500,000 square miles of land (about 13 per ...
— Modern Economic Problems - Economics Vol. II • Frank Albert Fetter
... arrangement of Mathematics, Physics, and the principles of Chemistry, and it will take up as illustrative and mind-expanding exercises, Astronomy, Geography, and Geology conceived as a general history of the Earth. Holding the whole together will be the theory of the Conservation of Energy in its countless aspects and a speculative discussion of the constitution of matter. A certain minimum of Historical and Political reading and of general "Library" would be insisted upon in Section ii. This could be made a quite noble ...
— Mankind in the Making • H. G. Wells
... going," as we say, it is of incalculable assistance to his stamina. The Englishman, partly through this lack of imagination and nervous sensibility, partly through his inbred dislike of extremes and habit of minimizing the expression of everything, is a perfect example of the conservation of energy. It is very difficult to come to the end of him. Add to this unimaginative, practical, tenacious moderation an inherent spirit of competition—not to say pugnacity—so strong that it will often show through the coating of his "Live and let live," half-surly, half-good-humored manner; ...
— New York Times Current History; The European War, Vol 2, No. 3, June, 1915 - April-September, 1915 • Various


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