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4.3 Sound, ultrasound and infrasound

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Question 38

A quality engineer tests a concrete support using an ultrasound probe. Two small reflectors embedded in the concrete are 36 mm apart along the path of the pulse. Echoes from the two reflectors arrive at the probe 18 μs18\ \mu\mathrm{s}18 μs apart.

What is the speed of ultrasound in the concrete?

[1]
A

4000 m/s4000\ \mathrm{m/s}4000 m/s

B

2000 m/s2000\ \mathrm{m/s}2000 m/s

C

1000 m/s1000\ \mathrm{m/s}1000 m/s

D

8000 m/s8000\ \mathrm{m/s}8000 m/s

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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