Sound WavesHardBloom L1
Question
Which of the following statements are wrong about the velocity of sound in air:
Options
A.decreases with increases in temperature
B.increases with decrease in temperature
C.decreases as humidity increases
D.independent of density of air
Solution
Sol. v = $\sqrt{\frac{\gamma RT}{M}}$
T↑ ⇒ v↑
As humidity increases, H2O increases (M = 18).
The molecular mass of dry air is close to that of N2 & O2 i.e. b/w 28 & 32.
Hence humidity lowers the Avg. molecular mass of air.
Hence velocity of sound increases.
Create a free account to view solution
View Solution FreeMore Sound Waves Questions
Which of the figures, shows the pressure difference from regular atmospheric pressure for an organ pipe of length L clos...The displacement of a particle undergoing SHM of time period T is given by x (t) = xcos (ωt + φ) The particle ...A source when at rest in a medium produces waves with a velocity v and a wavelength of λ . If the source is set in motio...In an organ pipe whose one end is at x = 0, the pressure is expressed by p = p0cos $\frac{3\pi x}{2}$sin 300πt where x i...A standing wave is created on a string of length 120 m and it is vibrating in 6th harmonic. Maximum possible amplitude o...