Question

A sound wave of frequency 500 Hz covers a distance of 1000 m in 5 second between points X and Y. The number of waves between X and Y are –

• A. 500
• B. 1000
• C. 2500
• D. 5000

Answer 1

Answer: (A)

500

Answer 2

v =$\sqrt{(\gamma P/\rho)}$, the density r of moisture is less than the density of air. Hence, the presence of moisture in air lowers the density. So, the velocity of sound in air increases.