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NSC111: Physics/Earth/Space
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Energy was not a well-defined scientific concept before 1800; most chemists considered heat to be a chemical element! We now know that heat is energy; it is the most basic form of energy, to which all useful energy is ultimately degraded.
Heat is a fascinating and slippery thing, and the topic of its own branch of physics and chemistry: thermodynamics. Thermodynamics studies how heat, and other forms of energy, are transferred from one body to another.
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