Two students are measuring the speed of sound in air. One student stands at position X X\,X and claps two wooden blocks together. The second student stands at position Y Y\,Y and starts a stopwatch when they see the blocks touch, stopping it when they hear the sound.
Which of the following changes would improve the accuracy of their measurement of the speed of sound?
Decrease the distance between position XXX and position YYY.
Use a manual analogue clock that measures only to the nearest second.
Increase the distance between position XXX and position YYY.
Use smaller, quieter wooden blocks.
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.