(a)[2]
Explain the difference between a longitudinal wave and a transverse wave. You may include a diagram, if you want, to support your explanation.
(b(i))[2]
A sound wave has frequency $3.8\,\text{kHz}$ and speed $330\,\text{m s}^{-1}$. Calculate the wavelength of the sound.
(b(ii))[1]
A different sound has a frequency of $3.8\,\text{Hz}$. State and explain whether a human with normal hearing is able to hear this sound.