The speed of a transverse wave, going on a wire having a length 50 cm and mass 5.0 kg, is 80 m/s. The area of cross-section of the wire is 1.0 mm2 and its Young's modulus is . Find the extension of the wire over its natural length (in mm).
The linear mass density of the wire,
The wave speed is
Thus, the tension is
The Young's modulus,
The extension is, therefore,
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