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Thermodynamics

Thermodynamics is the study of how heat, energy, and work move and transform within physical systems, like an engine converting fuel's heat into motion. It relies on a few core principles, called laws, that describe what is possible and impossible when energy changes form—for instance, energy can never be created or destroyed, only converted. These ideas explain everyday things like why ice melts, why engines need fuel, and why heat naturally flows from hot objects to cold ones.