A research vessel sends a sonar pulse vertically downwards to the seabed. The echo is detected 0.8 s later. If the speed of sound in seawater is 1500 m/s, how deep is the sea below the vessel?
300 m300\text{ m}300 m
600 m600\text{ m}600 m
1200 m1200\text{ m}1200 m
2400 m2400\text{ m}2400 m
295 exam-style questions on CIE IGCSE Physics Sound, covering Sound. Each one has a worked solution and a mark scheme showing where the marks go.