Suppose you watch a leaf bobbing up and down as ripples pass it by in a pond. you notice that it does two full up and down bobs each second. which statement is true of the ripples on the pond?
a.) they have a wavelength of two cycles per second.
b.) they have a frequency of 2 hertz.
c.) they have a frequency of 4 hertz.
d.) we can calculate the wavelength of the ripples from their frequency.

b.) They have a frequency of 2 hertz.

Explanation:

The frequency of a wave is the number of complete oscillations (cycles) made by the wave in one second.

Instead, the wavelength is the distance between two consecutive crests (highest position) or 2 troughs (lowest position) of the wave.

In this problem, we are told that the leaf does two full up and down bobs: this means that it completes 2 full cycles in one second. Therefore, its frequency is

where is called Hertz (Hz). So, the correct answer is

b.) They have a frequency of 2 hertz.

volume: 22

density: 7.04

k2s for potassium sulphide