Entropy, heat goes to cold.
Entropy is a concept from thermodynamics that measures the amount of disorder or randomness in a system. In simple terms, it refers to the tendency of systems to move from a state of order to a state of disorder. This concept is closely related to the second law of thermodynamics, which states that the total entropy of an isolated system can never decrease over time. In practical terms, entropy is often associated with the amount of energy in a system that is not available to do work.
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