2024 · M/J · 5054/21 | Q4

0/47parts marked · 0 of 80 marks

Question (4 of 8)10 marks · Practise this topic →

Options

Ultrasound of frequency 30 kHz has a wavelength of 0.011 m in air.

(a)(i)State what is meant by 'frequency'.

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

Calculate the speed of ultrasound in air.

(a)(ii)Show your working.

Answer guidance

Show The result is given, so every step of the reasoning is what earns the marks.

[2 marks]

(a)(iii)State one use of ultrasound.

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

Sound waves are longitudinal waves. Water waves are transverse waves.

Describe, by referring to the movement of the particles in the wave, the difference between a longitudinal wave and a transverse wave.

(b)(i)You may include a labelled diagram to help your description.

Answer guidance

Describe Say what happens, in order. Reasons are not required unless the question also asks why.

[3 marks]

(b)(ii)State one source of waves that generates both longitudinal and transverse waves.

Answer guidance

State A short answer. No explanation is needed, and adding one cannot earn extra marks.

[1 mark]

Fig. 4.1 shows radio waves of long and short wavelength passing over the same hill.

(c)Explain why the radio waves in diagram A reach the house but the radio waves in diagram B do not reach the house.

Answer guidance

Explain Give reasons, not just what happens. Each distinct reason is usually worth a mark.

[2 marks]

5054/21/M/J/24Cambridge O Level Physics 5054 · May/June 2024 · Paper 2 variant 1 · Question 4