Which of the following would not increase the velocity of a sound wave in air? a. lowering the humidity of the air. b. increasing the temperature of the air. c. increasing the wind speed in the direction the wave is traveling. d. lowering the density of the air

Lowering the humidity of the air.

Explanation:

The mathematical formula for the speed of sound wave is given by :

Where

is the adiabatic constant

T is the temperature of air

M is the molecular mass of the gas

or

B is the bulk modulus

is the density of the air

As the humidity of the air increases, then the number of water molecules increase. As a result, molar mass decreases and ultimately the speed of sound increases and vice versa.

So, the correct option is (A) " lowering the humidity of the air ". Hence, this is the required solution.

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