Answer:
Thermal energy that is not used to do work is often released to the surroundings.
Thermal energy flows from a warmer object to a cooler object.
Thermal energy is released as unusable energy by a heat engine, which is never 100 percent efficient.
Thermal energy flows when two objects in contact have a temperature difference.
Options 1, 3, 4, 5
Step-by-step explanation:
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