A hiker on a hill observes construction work in the valley below. She sees a heavy hammer strike a metal sheet, and hears the sound of the blow a short time later.
Identify the two physical quantities that must be measured to calculate the speed of the sound waves in air.
State the equation that relates these two quantities to speed.
Describe one way to improve the reliability or accuracy of the results obtained in this experiment.
43 exam-style questions on OCR GCSE Physics Wave behaviour. Each one has a worked solution and a mark scheme showing where the marks go.