Awoman is standing in the ocean, and she notices that after
awave crest passes by, five more crests pass in a time of 54.0
s. the distance between two successive crests is 39.257883151578
m. what is the wave's (a) period, (b) frequency, (c) wavelength,
and(d) speed?

Period, T = 10.86 seconds  

Frequency, f = 0.092 Hz  

Wavelength,          

Speed, v = 3.61 m/s                                                        

Explanation:

It is given that,

A woman notices that a wave crest passes by, five more crests pass in a time of 54.0 .

The distance between two successive crests is, the wavelength of wave,

(b)Frequency of a wave is given by number of oscillations per second such that,

f = 0.092 Hz

(a) Let T is the period of the wave. It is inverse of frequency of a wave such that,

T = 10.86 seconds

(c) The distance between two successive crest or trough is called wavelength of a wave, .

(d) The speed of a wave is given by :

v = 3.61 m/s

Hence, this is the required solution.

the answer is c. the lower legs are levers, and the knees are fulcrums. the ankles hold the loads.