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Answer:

D. 2.5 Hz

Explanation:

Frequency = speed of wave / wavelength

= 335 /140 ( from graph)

= 2.4

The frequency is the number of cycles attained by the wave in a second estimated frequency will be 2.40 hertz.

What is the frequency?

Frequency describes the number of waves that pass a fixed place in a given amount of time. So if the time it takes for a wave to pass is is 1/2 second, the frequency is 2 per second. If it takes 1/100 of an hour, the frequency is 100 per hour.

[tex]\rm Frequency =\dfrac{speed \ of \ wave}{wavelength}[/tex]

[tex]F= \dfrac{335 }{140} ( from graph)[/tex]

[tex]F=2.4 hertz[/tex]

Hence the frequency is the number of cycles attained by the wave in a second estimated frequency will be 2.40 hertz.

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