conservation of energy

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con·ser·va·tion of en·er·gy

the principle that the total amount of energy in a closed system remains always the same, none being lost or created in any chemical or physical process or in the conversion of one kind of energy into another, within that system.

conservation of energy

[kon′sərvā′shən]
Etymology: L, conservare, to preserve
(in physics) a law stating that in any closed system the total amount of energy is constant. It is superseded by the special relativity equation e = mc2, but it is still applicable in the chemical process.

conservation of energy

The principle according to which energy cannot be created or destroyed, but is transformed into other forms.
See also: energy
References in periodicals archive ?
Here, although the original law of gravity cannot be derived (the value of D may be any constant, certainly including the case that D=2), we already prove that the original law of gravity is not contradicted to the law of conservation of energy, or the original law of gravity is tenable accurately.
4 Deriving the original law of gravity by using the law of conservation of energy
Thus, we already derive the original law of gravity by using the law of conservation of energy.
The further topic is how to apply the law of conservation of energy to derive Eqs.
1, it can be said that we could not rely on any experimental data, only apply the law of conservation of energy to derive the improved law of gravity, and improved Newton's second law; and demonstrate that the original Newton's law of gravity and Newton's second law are all tenable approximately for this example.
P] calculated by the law of conservation of energy are as follows:
P], then we should have: 1 = 1/D', and D-- 1 = (D / D')-- 1; these two equations all give: D' = 1, this means that for free fall problem, by using the law of conservation of energy, we strictly derive the original Newton's second law F = ma.
4) that is established by the law of conservation of energy directly.
As well-known, the kinetic energy formula has been modified in the theory of relativity, now we improve the kinetic energy formula with the law of conservation of energy.
4 Contradiction between the law of conservation of energy and the law of conservation of momentum as well as the law of conservation of angular momentum
As well-known, unlike the law of conservation of energy, the law of conservation of momentum and the law of conservation of angular momentum are only correct under certain conditions.
Here we find another problem, if the original three conservation laws are all correct, therefore for certain issues, the law of conservation of energy and the other two conservation laws could be combined to apply.