Pearson Edexcel International GCSE (9–1) · PHYSICS · Section
The wave equation
16 practice questions
Practice questions
11–16 of 16
Question 11
3 marks · Normal
Answer and see the solution →A tuning fork produces sound waves in air with a frequency of 440 Hz. The speed of sound in air is 330 m/s. Calculate the wavelength of the sound waves.
Question 12
3 marks · Normal
Answer and see the solution →Describe what happens to the wavelength of water waves in a ripple tank if the frequency of the waves is increased while the wave speed remains the same.
Question 13
4 marks · Normal
Answer and see the solution →A student investigates water waves using a ripple tank. The student measures that 12 complete waves pass a point in 6.0 s. The wavelength of each wave is 25 cm.
(a)[2 marks]Calculate the frequency of the waves.
(b)[2 marks]Calculate the speed of the waves. Give your answer in m/s.
Question 14
3 marks · Normal
Answer and see the solution →In a laboratory experiment, a student uses a ripple tank to measure the wavelength and speed of water waves. Describe a method the student could use to measure the frequency of the waves.
Question 15
2 marks · Normal
Answer and see the solution →The table shows properties of three waves traveling with the same speed.
Wave properties Wave Frequency (Hz) Wavelength (m) A 10 2.0 B 4 5.0 C 20 1.0 (a)[2 marks]Which two waves have the same wave speed? Give your answer using wave letters.
Question 16
1 mark · Normal
Answer and check →Which change below would double the wave speed if the frequency of a wave stays the same?
- A.Double the wavelength.
- B.Halve the wavelength.
- C.Double the frequency.
- D.Halve the frequency.