A woman is standing in the ocean, and she notices that after a wave crest passes by, five more crests pass in a time of 68.0 s. The distance between two successive crests is 34.1 m. What is the wave's (a) period, (b) frequency, (c) wavelength, and (d) speed?

Answer 1

5T=68 => T=68/5=13.6 s
λ=34.1 m
v= λ/T
f=1/T

Answer 2

wave rock a boat in middle of a pond. the boat moves up and down 10 time in 20 s. what is the period of the wave ?