Which characteristic of the medium determine the velocity of longitudinal sound waves in a medium?

Define longitudinal wave.

A ray o light is incident on the surface of separation of a medium with the velocity of igth at an angle 45^@ and is refracted in the medium at an angle 30^@ .Velocty of light in the medium will be:(Veloctiy of light= 3xx10^8 m s^(-1) ).

In which medium the velocity of sound is more — solids or Gases ?

Arrange an experiment to demonstrate the formation of longitudinal wave.

Sound waves of wavelength lambda travelling in a medium with a speed of v m/s enter into another medium where its speed is 2v m/s.Wavelength of sound waves in the second medium is: