a wave is traveling at 36 m/s. if its wavelength is 12 m, how many times does a wavelength move across a set…

Answer:

B. three times

Explanation:

Step1: Recall wave - speed formula

The wave - speed formula is $v = f\lambda$, where $v$ is the wave speed, $f$ is the frequency, and $\lambda$ is the wavelength. We want to find the frequency $f$, which represents the number of wavelengths that pass a fixed point per second.

Step2: Rearrange the formula for frequency

We can rewrite the formula $v = f\lambda$ as $f=\frac{v}{\lambda}$.

Step3: Substitute given values

Given that $v = 36\ m/s$ and $\lambda=12\ m$, we substitute these values into the formula: $f=\frac{36}{12}=3\ Hz$. A frequency of 3 Hz means that a wavelength moves across a set point 3 times every second.