Pearson Edexcel International GCSE (9–1) · PHYSICS · Unit
Waves
356 practice questions
Topics covered
Practice questions
41–50 of 356
Question 41
3 marks · Easy
Answer and see the solution →A fishing float moves up and down as waves pass beneath it. The float completes one up-and-down motion every 0.8 seconds.
(a)[2 marks]Calculate the frequency of the wave.
(b)[1 mark]Explain what is meant by the term 'frequency' in this context.
Question 42
2 marks · Normal
Answer and see the solution →A sound wave travels through air at a speed of 330 m/s. If its frequency is 110 Hz, calculate the wavelength of this sound wave.
Question 43
3 marks · Normal
Answer and see the solution →The diagram shows a ripple tank setup used in a laboratory to investigate water waves.
Diagram of a ripple tank with a vibrating bar, water surface, lamp above, and waves on the water. (a)[1 mark]State the effect on the wavelength of waves if the motor produces waves at a higher frequency.
(b)[2 marks]Explain your answer to part (a).
Question 44
1 mark · Normal
Answer and see the solution →Write down the equation that links wave speed, frequency and wavelength.
Question 45
2 marks · Normal
Answer and see the solution →Describe what is meant by the frequency of a wave.
Question 46
2 marks · Normal
Answer and see the solution →A student uses a ripple tank to produce waves with a wavelength of 0.04 m. The tank's motor produces 25 waves every second. Calculate the speed of the water waves.
Question 47
2 marks · Normal
Answer and see the solution →A radio wave has a frequency of 6 × 10^8 Hz and travels at a speed of 3 × 10^8 m/s. Calculate its wavelength.
Question 48
3 marks · Normal
Answer and see the solution →A student states, 'If the frequency of water waves in a ripple tank is doubled, the speed of the waves will also double.'
Explain whether this statement is correct.
Question 49
2 marks · Normal
Answer and see the solution →Describe two observations that show how increasing the frequency of a ripple tank motor changes the pattern of waves seen.
Question 50
1 mark · Easy
Answer and see the solution →State what is meant by refraction.