Answer :
Answer: 0.14 Hz
Explanation:
We are told the person counts 10 waves in 68 s, from this information we can calculate the frequency [tex]f[/tex], which is defined as the number of oscilations or waves per unit of time. Then:
[tex]f=\frac{10 waves}{68 s}[/tex]
[tex]f=0.14 s^{-1}[/tex]
This is the frequency of the ocean waves. Now, according to the International System of Units (SI), frequency is measured in Hertz ([tex]Hz[/tex]), which is equivalent to [tex]s^{-1}[/tex].
So, according to this, the frequency of the ocean waves is [tex]f=0.14 Hz[/tex]