(a(i))[1]
State how the tuning fork generates the sound.
(a(ii))[1]
Complete the sentence below. Choose a word from the box: electromagnetic, longitudinal, transverse. A sound wave is [BLANK].
(a(iii))[2]
A loudspeaker emits a sound of frequency 25 kHz. A student with healthy ears cannot hear this sound. Explain why.
(b(i))[1]
The air particles are in motion. On Fig. 8.2, draw two arrows pointing in opposite directions to show how the air particles move.
(b(ii))[1]
Use Fig. 8.2 to find the wavelength of the sound wave.
(c)[4]
Describe a way of using water waves to show refraction.