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The extension in a string, obeying Hooke...

The extension in a string, obeying Hooke’s law, is x. The speed of the wave in the stretched string is v. If the extension of string is increased to 1.5 x, then the speed of the wave in the string will be

A

1.22 v

B

0.61 v

C

1.50 v

D

0.75 v

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