A student is standing on a school sports field, exactly 300 m away from an assistant who fires a starter pistol.
When the pistol is fired, a puff of smoke is seen and a loud bang is heard.
Describe how the student can measure the time it takes for the sound wave from the bang to travel the 300 m.
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.