(a)[3]
Sound waves are made up of compressions and rarefactions. Explain the terms compression and rarefaction. In your explanation, refer to the spacing of molecules and the pressure for sound waves in air.
(b(i))[3]
Calculate the wavelength of this sound.
(b(ii))[2]
The frequency of the sound from the instrument is altered to 5.1 kHz and the amplitude of the sound is increased. Without calculating, state what happens to (1) the speed of the sound (2) the wavelength of the sound.