(i) State which property of a sound wave must be increased to make the sound louder.

(ii) State which property of a sound wave must be increased to make the pitch of the sound higher.

Sound waves travel as longitudinal waves.

(i) Light is an example of a transverse wave. Give another example of a transverse wave.

(ii) Describe how the vibrations of longitudinal waves and transverse waves differ relative to the direction of energy transfer.