Question

practice it!
which of the following is true about heat transfer?
the heat will flow from the hotter object to the cooler object.
the heat will flow from the cooler object to the hotter object.
the heat will flow until objects switch temperatures.
the heat will flow from the ground to the atmosphere.

Explanation:

Heat transfer occurs due to temperature differences. By the second law of thermodynamics, heat naturally flows from a region of higher temperature (hotter object) to a region of lower temperature (cooler object) until thermal equilibrium (same temperature) is reached. The second option is incorrect as heat doesn't flow from cooler to hotter spontaneously. The third option is wrong because heat flows until temperatures equalize, not switch. The fourth option is not always true (depends on relative temperatures of ground and atmosphere) and is too specific, while the first option is a fundamental principle of heat transfer.

Answer:

The heat will flow from the hotter object to the cooler object.