Question

A Sounds wave has wavelength 0.86m and speed 344m/s in air. If its wavelength in a gas is 0.8m,find the speed of sound in gas

Answer 1

We know, frequency f= V/λ

f₁= v₁/λ₁ and f₂=v₂/λ₂

But frequency remains constant irrespective of medium. So f₁=f₂

v₁/λ₁ =v₂/λ₂

v₂=(v₁/λ₁)×λ₂

   = (344/0.86)×0.8

   =320 m/s