Respuesta :
Answer:
85.7Hz
Explanation:
We know that the wave velocity is given by:
v=f*λ
where:
f is the frequency
λ is the wavelength
rearranging the equation we have:
f=v/λ
[tex]f=\frac{30m/s}{0.35m}\\f=85.7s^{-1}=85.7Hz[/tex]
so the pendulum has a frequency of 85.7Hz