Students are measuring the speed of sound in air. One student stands 150 m away from a second student and claps two wooden blocks together. The second student starts a stopwatch when they see the blocks meet and stops it when they hear the sound.
They record the following times:
Explain why their measured times vary so much.
64 exam-style questions on Edexcel GCSE Physics 4.1 Wave properties. Each one has a worked solution and a mark scheme showing where the marks go.