15.19 Explain why (or how):

(a) In a sound wave, a displacement node is a pressure antinode and vice versa

 

(b) Bats can ascertain distances, directions, nature, and sizes of the obstacles without any “eyes”

 

(c) A violin note and sitar note may have the same frequency, yet we can distinguish between the two notes

 

(d) Solids can support both longitudinal and transverse waves, but only longitudinal waves can propagate in gases

 

(e) The shape of a pulse gets distorted during propagation in a dispersive medium

A set of 16 tuning forks are so arranged that each produce 4 beats with the previous one. If the frequency of last tuning fork is double that of first, the frequency of third tuning fork is

A pipe open at both ends produces a note of fundamental frequency V₁. When the pipe is kept with (1/3)^rd of its length in water, it produces a note of frequency V₂.The value of V₁/ V₂ is

A string of linear density 0.4 kg/m is stretched with force of 1000 N. A transverse wave is set up along it. The speed of the wave is

A particle is executing S.H.M. its potential energy v/s displacement graph is given by

The value of restoring force constant is :-

A heavy rope is suspended from rigid support. A wave pulse is set up at the lower end. Then