Multiple choice

The heat always flows from

  1. higher temperature to lower temperature

  2. lower temperature to higher temperature

  3. equal temperature

  4. all of these

  5. none of these
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A Correct answer
Explanation

Heat always flows naturally from a region of higher temperature to a region of lower temperature due to the second law of thermodynamics. This spontaneous flow continues until thermal equilibrium is reached, meaning both objects attain the same temperature. Heat cannot flow from cold to hot without external work being done, such as in refrigeration systems.

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