Why are longitudinal waves not polarized?

Define longitudinal wave.

Is it possible to have longitudinal waves on: a string and on a transverse wave in a steel rod?

Explain why (or how): Solids can support both longitudinal and transverse waves, but only longitudinal waves can propagate in gases.

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

With propagation of longitudinal waves through a medium,the quantity transmitted is: