Question

Seema was getting late to school, her horlicks was too hot to drink. Her mother kept the glass of horlicks in a bowl of cold water. Now Seema drank the horlicks quickly and left for school. Justify Seema’s mother’s action.

Answer 1

Explanation:

Rate of evaporation depends on surface area of liquids. The more is the surface area of the liquid, the more is the rate of evaporation of the liquid. This is due to increased number of suface molecules. When these surface molecules are exposed to atmosphere, they gain energy and escape into atmosphese. And hence hot milk in the bowl gets cooled easily. And now Seema's mother seems to be happy.