Dierdra began writing a summary of the relationship between the first and second laws of thermodynamics. Thermal energy in a system is conserved and can increase the system’s internal energy and/or be used to do work. Which best completes Dierdra’s summary?

The first law of thermodynamics says energy is conserved, so thermal energy is not created or destroyed as it enters or leaves a system. The second law says that, without outside intervention, thermal energy flows from warmer objects to cooler objects. Therefore, the best completion is that thermal energy moves from warmer objects to cooler objects.

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