Figure 1 shows a laboratory setup used to study seismic-like surface waves in a soil-filled test flume.

An engineer wants to determine the frequency of these waves.
Describe how the engineer could use the digital stopwatch to determine the frequency of the waves.
Practise Edexcel GCSE Physics Wave properties and behaviour with exam-style questions for Foundation and Higher tier. 100 questions, matched to the Edexcel GCSE Physics (1PH0) specification and written in Paper 1 and Paper 2 style. Every question includes a full worked solution and mark scheme, so you can see where marks are awarded rather than just whether you got the answer right.