Water wave frequency

Question

A water wave vibrates up and down four times each second, the distance between two successive crests is 5 meters, and the height from the lowest part to the highest part of the wave is 2 meters.

What is the frequency of the wave in hertz?

What is the period of the wave in seconds?

What is the speed of the wave in meters per seconds?

What is the amplitude of the wave in meters?

Answer 1

The frequency is 4 Hertz (4 times / second) and the period is the inverse of the frequency (i.e. 0.25 seconds). The speed of the wave is the frequency times the wavelength (20 m/s) and the amplitude is the difference between the lowest and highest parts of the wave. (2 m).