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 (physics only). Each one has a worked solution and a mark scheme showing where the marks go.