An industrial safety inspector uses an ultrasonic thickness gauge to monitor the remaining wall thickness of a pressurized steel pipeline prone to internal corrosion. Explain how high-frequency ultrasound pulses are used by the gauge to non-destructively determine the thickness of the steel pipeline wall.
In your answer, you should describe:
35 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.