Question

a person standing in the ocean notices that after a wave crest passes by ten more crest pass in a time of 120s what is the frequency

Answer 1

The frequency of a wave is defined as the number of complete oscillations per unit of time:

`f= (N)/(t)`
For the wave in this problem, we have 10 oscillations (because 10 crests pass through a given point in space) in a time of 120 s, therefore the frequency of the wave is

`f= (10)/(120 s)=0.083 Hz`