Question

you observe that 28 crests of a water wave pass you each minute. if the wavelength is 11 m , what is the speed of the wave ?

Answer 1

ANSWER:

5.13 m/s

STEP-BY-STEP EXPLANATION:

First we calculate the total length, like this:

$\begin{gathered} l=28\cdot11 \\ l=308 \end{gathered}$

Now we divide by the time it takes, which is equal to 1 minute, that is 60 seconds, therefore:

$\begin{gathered} v=\frac{308}{60} \\ v=5.13\text{ m/s} \end{gathered}$

The speed of the wave is 5.13 m/s