(a)[2]
A pulse of microwaves leaves the transmitter and returns to it 0.24 s later. The speed of microwaves is $3.0 \times 10^8\,\text{m s}^{-1}$. Calculate the distance from the transmitter on the Earth to the satellite.
(b(i))[2]
Put ticks (✓) in the table in Fig. 5.1 to indicate whether microwaves and sound waves are longitudinal or transverse, and to show whether they are electromagnetic.
(b(ii))[1]
A compression is found in a longitudinal wave. Describe what is meant by a compression.