On a humid summer day, perspiration does not cool you off much.Why? A)The air de

Question

On a humid summer day, perspiration does not cool you off much.Why?

A)The air density is extremely low and theair pressure is too high to permit water to evaporate.
B)The water vapor in the air is moving too fastto condense on your skin as perspiration.
C)The air density is extremely low and itspressure is too low to permit water to evaporate.
D)The air is almost saturated with water vaporand there is almost no net evaporation. Hint: The air is almost saturated. The rate of evaporationtherefore is nearly equal to the rate of condensation. Thereis really no net evaporation, therefore no net cooling.

A)The air density is extremely low and theair pressure is too high to permit water to evaporate.
B)The water vapor in the air is moving too fastto condense on your skin as perspiration.
C)The air density is extremely low and itspressure is too low to permit water to evaporate.
D)The air is almost saturated with water vaporand there is almost no net evaporation. Hint: The air is almost saturated. The rate of evaporationtherefore is nearly equal to the rate of condensation. Thereis really no net evaporation, therefore no net cooling. Hint: The air is almost saturated. The rate of evaporationtherefore is nearly equal to the rate of condensation. Thereis really no net evaporation, therefore no net cooling.

Explanation / Answer

A)The air density is extremely low and theair pressure is too high to permit water to evaporate.
B)The water vapor in the air is moving too fastto condense on your skin as perspiration.
C)The air density is extremely low and itspressure is too low to permit water to evaporate.
D)The air is almost saturated with water vaporand there is almost no net evaporation. Hint: The air is almost saturated. The rate of evaporationtherefore is nearly equal to the rate of condensation. Thereis really no net evaporation, therefore no net cooling.

option D is correct.
Hint: The air is almost saturated. The rate of evaporationtherefore is nearly equal to the rate of condensation. Thereis really no net evaporation, therefore no net cooling.

option D is correct.

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