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in Physics by (71.1k points)

The two parts of sonometer wire divided by a movable knife differ by 2 mm and produce one beat per second when sounded together. Find their frequencies if the whole length of the wire is one metre.

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Best answer

If L1 and L2 be the lengths of two points of the wire, then

L1 + L2 = 1000 mm 

and L1 – L2 = 2 mm

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