A researcher standing in front of a vertical cliff wall sounds a horn and hears the echo 1.8 s later. The speed of sound in air is 340 m s-1.
How far from the cliff is the researcher?
153 m153\text{ m}153 m
306 m306\text{ m}306 m
612 m612\text{ m}612 m
1100 m1100\text{ m}1100 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.