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4.3 Sound, ultrasound and infrasound

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Question 28
F

A loudspeaker produces a sound wave with a frequency of 850 Hz.

The speed of sound in air is 340 m/s.

a.

Calculate the wavelength of the sound wave in air.

[3]
b.

The sound wave passes from the air into the water of a swimming pool. The speed of sound in water is 1500 m/s.

Give the frequency of the sound wave in the water.

[1]
c.

Calculate the wavelength of the sound wave in the water.

[2]
d.

Explain why the wavelength of the sound wave in the water is longer than its wavelength in the air.

[2]
Markscheme

4.3 Sound, ultrasound and infrasound Questions

  1. GCSE
  2. /Physics
  3. /4.3 Sound, ultrasound and infrasound

112 exam-style questions on Edexcel GCSE Physics 4.3 Sound, ultrasound and infrasound, covering 4.3.1 Sound waves, vibrations and the human ear, 4.3.2 Ultrasound and infrasound, 4.3.3 Uses of ultrasound and infrasound, and 4.3.4 Sound waves passing between media. Each one has a worked solution and a mark scheme showing where the marks go.

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