# Ripples are produced on water surface in a bucket. the separation between consecutive crests is mm and the ripples produced on surface at a speed of 2 cm per second. How many crests hit the wall of the container per second ?

##### 1 Answer

Jan 7, 2018

100 crests hit the wall of the container per second.

#### Explanation:

To make our length units consistent, I will convert the speed to 20 mm/s. The formula that relates speed, v; wavelength,

Therefore the frequency is

Therefore, 100 crests hit the wall of the container per second.

I hope this helps,

Steve