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.

a charge 3q is at the origin, and a charge −2q is on the positive x axis at x=a. part a where on the x-axis would you place a third charge so it would experience no net electric force? enter an expression for the exact answer, which will involve a square-root sign. (do not enter an approximate decimal answer.)

a high pressure system is a dense air mass that is usually cooler and drier than the surrounding air. a low pressure system is a less dense air mass that is usually wetter and warmer than the surrounding air.

in general, areas that experience high atmospheric pressure also experience fair weather. low pressure systems can cause the formation of clouds and storms. air usually flows from areas of high pressure to areas of low pressure..