Answer:
13 Hz
Step-by-step explanation:
The frequency of a wave is given by the equation:

where
f is the frequency
v is the speed of the wave
is the wavelength
In this problem, we have:
v = 5.2 m/s is the speed of the wave
is the wavelength (distance between two adjacent crests)
Substituting into the formula, we find the frequency of the wave:
