Chapter 9.1, Problem 4R

To determine

A mechanical wave that is also a longitudinal wave.

Answer to Problem 4R

A mechanical wave that is also a longitudinal wave is sound wave.

Explanation of Solution

Introduction:

The waves in which the particles move along the direction of propagation of wave are called longitudinal wave.

The waves which require a medium for propagation are called mechanical waves and in longitudinal waves the particle move parallel to the direction of propagation of wave. The best example of a wave which is both mechanical and longitudinal is sound wave because it requires a medium to travel and the system particles also move in parallel to the direction of propagation.

Conclusion:

A mechanical wave that is also a longitudinal wave is sound wave because it require medium to propagate as well as particles travel parallel to the direction of propagation.