Are the waves propagating in solids transverse, longitudinal or both ?

As a wave propagates,

Given below are some examples of wave motion. State in each case if the wave motion is transverse , longitudinal or a combination of both: (a) Motion of a kink in a longitudinal spring produced by displacing one end of the spring sideways. (b) Waves produced in a cylinder containing a liquid by moving its piston back and forth. (c) Waves produced by a motorboat sailing in water. (d) Ultrasonoic waves in air produced by a vibrating quartz crystal.

Given below are some examples of wave motion. State in each case if the wave motion is transverse, longitudinal or a combination of both: (a) Motion of a kink in a longitudinal spring produced by displacing one end of the spring sideways. (b) Waves produced in a cylinder containing a liquid by moving its piston back and forth. (c ) Waves produced by a motorboat sailing in water. (d) Ultrasonic waves in air produced by a vibrating quartz crystal.

(a) Give reason why transverse waves can be propagated in solids, (b) Give reason why longitudinal waves can be propagated through all the three types of media - solids, liquids and gases. (c) Describe in brief about two types of waves that can be propagated on the free surface of water.

Which type of waves can propagate in solids ?

Define longitudinal stress.

When wave propagating in one medium, enters another medium, which of the characteristic do remain constnat ?