A sound pulse is sent vertically downwards from a transmitter 2.0 m below the water surface. Its echo returns after 0.080 s. Sound travels at 1500 m/s in the water. What is the depth of the seabed below the water surface?
62 m62\ \mathrm{m}62 m
122 m122\ \mathrm{m}122 m
58 m58\ \mathrm{m}58 m
60 m60\ \mathrm{m}60 m
112 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties, covering 4.1.1 Waves transfer energy and information, 4.1.2 Frequency, wavelength, amplitude, period and wavefronts, 4.1.3 Longitudinal and transverse waves, 4.1.4 The wave speed equations, 4.1.5 Measuring wave velocity, and 4.1.6 Calculating depth or distance from waves. Each one has a worked solution and a mark scheme showing where the marks go.