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The vibration portion of a wire which is...

The vibration portion of a wire which isstretched with a weight of6.48kg weighs 0.5 gm.When sounding in fundamental note, it isfound togive20 beats in5 seconds, witha vibrating tuning fork of frequency 256. If the length of the wire is slightly decreased, the note emitted by it is observed to be in unison withthat ofthe fork. Calculatethe original length of the wire.

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