(a(i))[1]
State a representative value for the speed of sound in air.
(a(ii))[1]
State the range of frequencies a healthy human ear can hear.
(b(i))[2]
Using your value for the speed of sound in (a)(i), calculate the frequency of the sound wave.
(b(ii))[1]
On Fig. 6.1, draw dotted lines to show three separate rarefactions.
(b(iii))[2]
State, in terms of both molecules and pressure, what is meant by a rarefaction.