Question

A girl on the beach sees 8 waves pass in 4 s. If the wavelength of each

wave 1.2 m, what is the velocity of the waves?
This is for cherylnotcherry

Answer 1

The velocity of wave is 2.4m/s.

Step-by-step explanation:

First, find the frequency using the formula :

`f = (1)/(t)`

Let t = 4,

`f = (1)/(4)`

`f = 0.25Hz`

Next, given that each wave is 1.2m and there are 8 waves so the wavelength is :

`λ = 1.2 * 8`

`λ = 9.6m`

Lastly, you have to use velocity formula :

`v = f * λ \:`

Let f = 0.25Hz,

Let λ = 9.6m,

`v = 0.25 * 9.6`

`v = 2.4`

(Correct me if I am wrong)

Answer 2

Velocity = frequency x wavelength

=
`(8)/(4)` x 1.2

= 0.6 m/s