Answer:
2.55 Hz
Explanation:
The frequency of the wave given it's velocity and wavelength can be found by using the formula
[tex]f = \frac{c}{ \lambda} \\ [/tex]
where
c is the velocity of the wave in m/s
[tex] \lambda[/tex] is the wavelength in m
From the question
c = 7.9 m/s
[tex] \lambda[/tex] = 3.1 m
We have
[tex]f = \frac{7.9}{3.1} = 2.548387... \\ [/tex]
We have the final answer as
2.55 Hz
Hope this helps you
