The longitudinal waves travel in a coiled spring at a rate of $4 m / s$ . The distance between two consecutive compressions is $20 c m$ . Find the frequency of the wave?

15 hertz

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20 hertz

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25 hertz

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30 hertz

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Solution

The correct option is B
20 hertz

Wavelength = distance between two consecutive compressions $= 20 c m = 0.2 m$

We know that,

speed = frequency x wavelength

Frequency = $\frac{speed}{wavelength}$

= $\frac{4}{0.2}$ = $20 hertz$

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The longitudinal waves travel in a coiled spring at a rate of 4 m/s. The distance between two consecutive compressions is 20 cm. Find the frequency of the wave?

The correct option is B 20 hertz Wavelength = distance between two consecutive compressions =20 cm = 0.2 m We know that, speed = frequency x wavelength Frequency = speedwavelength = 40.2 = 20 hertz

The longitudinal waves travel in a coiled spring at a rate of $4 m / s$ . The distance between two consecutive compressions is $20 c m$ . Find the frequency of the wave?

The correct option is B
20 hertz

Wavelength = distance between two consecutive compressions $= 20 c m = 0.2 m$

We know that,

speed = frequency x wavelength

Frequency = $\frac{speed}{wavelength}$

= $\frac{4}{0.2}$ = $20 hertz$