A ship uses sonar to measure the depth of the sea. A pulse of ultrasound is sent down to the seabed.
The echo is detected 0.60 s after the pulse is sent. The speed of ultrasound in sea water is 1500 m/s.
What is the depth of the sea below the ship?
450 m450\ \text{m}450 m
900 m900\ \text{m}900 m
1250 m1250\ \text{m}1250 m
2500 m2500\ \text{m}2500 m
50 exam-style questions on OCR GCSE Physics 8.3 Beyond Earth, covering 8.3.1 Red-shift and the expanding universe, 8.3.2 Evidence for the Big Bang model, 8.3.3 Formation of the Sun and stellar equilibrium, 8.3.4 Radiation emitted by hot bodies, 8.3.5 The solar system and satellites, 8.3.6 Gravity and circular orbits, 8.3.7 Orbital radius and orbital speed, 8.3.8 Radiation balance and the temperature of the Earth, and 8.3.9 Seismic waves and exploring hidden structures. Each one has a worked solution and a mark scheme showing where the marks go.