ANSWER:
3rd option: 10.6 Hz
STEP-BY-STEP EXPLANATION:
Given:
Wavelength (λ) = 4.72 m
Speed (v) = 50 m/s
We calculate the value of the frequency using the following formula:
[tex]\begin{gathered} v=\lambda\cdot f \\ \\ \text{ we replacing} \\ \\ 50=4.72\cdot f \\ \\ f=\frac{50}{4.72} \\ \\ f=10.6\text{ Hz} \end{gathered}[/tex]The frequency is equal to 10.6 Hz, therefore, the correct answer is 3rd option: 10.6 Hz
