A researcher places an ultrasound probe on the upper surface of floating ice. The probe sends a pulse with a frequency of 2.50 MHz into the ice. The wavelength of the ultrasound in the ice is 1.50 mm.
The echo from the lower surface of the ice returns to the probe after 0.750 ms.
Calculate the thickness of the ice.
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.