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b. A physics 1021 student measures the speed of a wave in a string of length L. She then decreases the length of the string t

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Answer #1

The speed of the wave remains the same as in the first case because the speed of a wave on a string is given by

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As \mu is the mass per unit length of a string which remains constant and does not depends upon the length of the string, and the tension is constant so speed will also remain constant only the frequency changes.

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