(a(i))[1]
The pitch of a sound wave increases. Tick one box to show the change that happens.
(a(ii))[1]
The loudness of a sound wave increases. Tick one box to show the change that happens.
(b)[1]
Tick the one box that shows why the astronaut cannot hear this sound.
(c(i))[1]
State a rough value for the speed of sound in water.
(c(ii))[2]
Calculate the wavelength in water for a sound wave with frequency 12 kHz.
(d)[3]
On Fig. 6.2, draw three crests of the wave that have just emerged through the gap in the barrier.