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Results tagged with energy
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user 21614
Energy is the conserved quantity associated to time-translation invariance and represents the work a system is capable of doing. Use this tag for questions about energy, and consider adding the [energy-conservation] tag if it is specifically about its conservation.
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Where do planets get energy to revolve around sun?
And since they do not encounter large amounts friction while moving though space (it's a near-vacuum) they do not need energy to keep moving. …
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