Question

Ocean waves are hitting a beach with a frequency of 0.100 Hz. Their average wavelength is 15.0 m. What is their average speed?

What is the frequency of a pendulum that is moving at 30 m/s with a wavelength of 0.32 m?

Answer 1

Average speed=1.5 m/s

Frequency of pendulum=93.75Hz

Step-by-step explanation:

We are given

Frequency,
`f=0.100Hz`

Average wavelength =
`\lambda=15m`

Speed of pendulum,
`v=30m/s`

Wavelength,
`\lambda'=0.32m`

We have to find the average speed and frequency of pendulum.

We know that

Speed,
`v=\lambda f`

Using the formula

Average speed,
`v=15* 0.1=1.5m/s`

Hence, the average speed =1.5m/s

Frequency,
`f=(v)/(\lambda')`

Using the formula

`f=(30)/(0.32)`

`f=93.75Hz`

Hence, the frequency of a pendulum=93.75Hz