A microwave signal from a transmitter on the Earth's surface is sent up to a satellite in orbit and is then immediately transmitted back to Earth. [Figure 5.1 is a blank table with rows for "microwaves" and "sound" and columns for "longitudinal", "transverse", and "electromagnetic".]

1. (a)A pulse of microwaves from the transmitter is received back at the transmitter 0.24 s later. The speed of microwaves is 3.0 x 10⁸m/s. Calculate the distance from the transmitter on the Earth to the satellite. distance = .....................................................[2][2]
2. (b)(i)The microwave signal is used in a telephone system that produces sound. Waves are described as longitudinal or transverse. Some waves are also electromagnetic. Place ticks (✔) in the table in Fig. 5.1 to show whether microwaves and sound waves are longitudinal or transverse and to show whether they are electromagnetic. [2][2]
3. (b)(ii)A longitudinal wave contains a compression. Describe what is meant by a compression.[1]

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