Question

a swimmer coming out of a pool of water soon feels cold on a sunny day. the swimmer experienced coldness because a. water evaporates from the skin. b. convection occurs in the air. c. air is a bad conductor of heat. d. water is a good conductor of heat.

Explanation:

When a swimmer comes out of water, the water on the skin starts to evaporate. Evaporation is a cooling process as it requires heat energy (latent heat of vaporization) which is taken from the skin, thus making the swimmer feel cold. Convection in air (option B) doesn't directly cause the cold feeling here. Air being a bad conductor (option C) is not relevant to the immediate cold sensation from wet skin. Water is not a good conductor of heat (in fact, it's a poor conductor compared to metals), so option D is incorrect.

Answer:

A. water evaporates from the skin.