Question

A student wants to demonstrate the transfer of thermal energy. if she puts her warm hand on a cold metal doorknob, how will thermal energy move?

A- Cold moves from the doorknob to her hand.
B - Heat moves from her hand to the doorknob.
C- Heat moves from the doorknob to her hand.
D- Cold moves from her hand to the doorknob.

Answer 1

When a student places a warm hand on a cold metal doorknob, heat transfers from the warm hand to the cold doorknob until thermal equilibrium is reached. So the correct answer is Option B.

Step-by-step explanation:

If a student puts her warm hand on a cold metal doorknob, the thermal energy will move from the warmer object to the cooler one. This is explained by the principle that heat transfers from a higher temperature object to a lower temperature object due to the temperature difference. In this case, heat will flow from the student's warm hand into the cold metal doorknob until both reach thermal equilibrium, which translates to option B - Heat moves from her hand to the doorknob.