Q.

When temperature difference between liquid and its surroundings is doubled, the rate of loss of heat will:

A. remain same
B. double
C. three times
D. four times
Answer» B. double
Explanation: According to Newton's law of cooling, the rate of loss of heat of a body is directly proportional to the difference between the temperature of hot body and temperature of the surroundings, provided that the difference in temperature is small enough.
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