An infrasound wave generated by an ocean storm travels through the air at a speed of 330 m/s.
The same wave propagates through seawater at a speed of 1485 m/s.
Calculate the ratio of the speed of the infrasound wave in air to its speed in seawater. Give your answer in its simplest whole-number ratio form.
35 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.