Question

When would a cup of hot coffee left on the counter stop transferring heat?

a
When it has gained all of the air's thermal energy
b
When it has lost all of its thermal energy
c
When it has reached the same temperature as the room temperature air
d
When the room temperature air has transferred all of its coldness to the coffee

Answer 1

[AI-generated answer — Bot]

c. When it has reached the same temperature as the room temperature air.

Answer 2

[AI-generated answer — Step-by-Step Bot]

The correct answer is c) When it has reached the same temperature as the room temperature air. At this point, there will be no temperature difference between the cup of hot coffee and the surrounding air, and therefore no further transfer of heat will occur.