Question

question 23 of 28 which scenario is an example of the transfer of thermal energy by radiation? a. a hot - water heating system warms a room. b. a microwave oven causes water molecules in a cup to vibrate faster. c. a piece of chocolate melts in a persons hand. d. a persons body temperature falls as the person swims in the ocean.

Explanation:

• Option A: A hot - water heating system warms a room mainly through convection (the movement of hot water and the circulation of warm air).
• Option B: A microwave oven emits electromagnetic waves (radiation). These waves cause water molecules in a cup to vibrate faster. This is an example of thermal energy transfer by radiation.
• Option C: A piece of chocolate melts in a person's hand due to conduction (direct heat transfer from the hand to the chocolate).
• Option D: A person's body temperature falls as they swim in the ocean mainly due to convection (heat transfer between the body and the moving water).

Answer:

B. A microwave oven causes water molecules in a cup to vibrate faster.