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Question

A longitudinal wave travels through a coiled spring at a speed of 4 ms1. The distance between two consecutive compression is 20 cm. Find the frequency of the wave.

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Solution

We know that,

Wavelength = distance between two consecutive compressions (here wavelength = 20 cm = 0.2 m)

Also, speed = frequency×wavelength

or, Frequency = speedwavelength

= 40.2 = 20 hertz


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