Question

As you sit on a dock, you notice a wave crest pass. You count another four

wave crests in the next 12 seconds. What is the frequency of these waves?
A. 12 Hz
B. 0.333 Hz
C. 4 Hz
D. 3 Hz

Answer 1

B) 0.333 Hz

Step-by-step explanation:

Lets see what are the main properties of a wave

• The frequency of a wave is the number of times per second that the wave cycles. - measured in Hertz (Hz)

• wave crest is shown in the figure.

• wavelength of a wave is the distance between corresponding points of two consecutive waves.
• The period of the wave is the time between wave crests
• The amplitude of a wave is a measure of the displacement of the wave from its rest position

observer sees 4 crests in 12 seconds

according to this , the number of crests he sees in a minute

`frequency=(4)/(12) =0.333 Hz`