Explanation:

When a disturbance is produced inside a medium, it gets transported by oscillating particles of the medium, and the disturbance is a type of energy which is carried by oscillating particles by making passing it to the next particle, in this way a longitudinal wave get propagates; as a result, energy propagates in a longitudinal wave. www.gradeup.co 12 As there is no equivalent movement of the medium particles in the propagation of the wave, they only vibrate about the centers of rarefaction and of compressions; therefore momentum isn't transferred in a longitudinal wave . Thus only the energy is propagating inside the direction of the wave.