(a)[1]
State what frequency means.
(b(i))[1]
State what a compression is.
(b(ii))[2]
On Fig. 7.1, sketch the compression pattern after the sound wave has gone through the gap.
(b(iii))[1]
Describe the effect this has on the compression pattern after the sound wave has passed through the gap.
(c(i))[2]
Calculate the wavelength of the sound wave in air.
(c(ii))[1]
State a typical value for the speed of sound in a liquid.