The Second Law of Thermodynamics says that every time energy changes from one form to another, some becomes heat, and is no longer useful (unless of course you want to heat something).
(The Second Law of Thermodynamics; says; ) (some; becomes; heat) (some; is no longer; useful) (you; want; to heat something) Context(you want,List([156, 164))):(you; want to heat; something)
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