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4.3 Sound, ultrasound and infrasound

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Question 46
H

A boat records two echoes from one ultrasound pulse. The echo from a shoal of fish returns after 0.12 s. The echo from the seabed returns after 0.40 s.

Both echoes follow vertical paths. The speed of ultrasound is 1500 m/s.

How far above the seabed is the shoal?

[1]
A

420 m420\ \mathrm{m}420 m

B

390 m390\ \mathrm{m}390 m

C

210 m210\ \mathrm{m}210 m

D

780 m780\ \mathrm{m}780 m

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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