I have a question as part of my coursework but I can't make sense of it, can anyone please help?
Adam is sitting on the end of a pier at the seaside. He watches the waves passing the end of the pier. The pier is 20m long. He counts 15 waves passing the pier.
(ii) It takes one minute for the waves to pass.
I need to find the frequency and the wavelength but I am lost.
I know the formula is velocity = frequency x wavelength