The velocity of sound in moist air is more than in dry air because the moist air has

Options

A. less density than dry air.
B. less pressure than dry air.
C. more pressure than dry air.
D. more density than dry air

Answer

A

Explanation

The density of dry air is more than that of moist air (when moisture is removed from air, its density increases). The speed of sound in a medium is inversely proportional to the square root of its density. Therefore, the speed of sound in moist air is more than that in dry air.