The velocity of sound in dry air is `V_(d)`, and in moist air it is `V_(m)`. The velocities are measured under the same conditions of temperature and pressure. Which of the following statements is fully correct?

Options

A. `V_(d) gt V_(m)` because dry air has lower density than moistair
B. `V_(d) lt V_(m)` because moistair has lower density than dry air
C. `V_(d) gt V_(m)` because the bulk modulus of dry air is greater than that of moist air
D. `V_(d) lt V_(m)` because the bulk modulus of moist air is greater than that of dry air

Answer

B

Explanation

As density of moist air is less than that of dry air and speed of sound is inversely proportional to the square root ofthe density ofair, option (B) is correct.