Question
Physics Question on thermal properties of matter
Two friends A and B are waiting for another friend for tea. A took the tea in a cup and mixed the cold milk and then waits. B took the tea in the cup and then mixed the cold milk when the friend comes. Then the tea will be hotter in the cup of
A
A
B
B
C
tea will be equally hot in both cups
D
friend's cup
Answer
A
Explanation
Solution
The rate of heat loss is proportional to the difference in temperature. The difference of temperature between the tea in cup A and the surrounding is reduced, so it loses less heat, the tea in cup B loses more heat because of large temperature difference. Hence, the tea in cup A will be hotter.