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4. A wire of length 3 m, diameter 0.4 mm...

4. A wire of length 3 m, diameter 0.4 mm and Young's modulus 8 x 101°N/mis suspended from a point and supports a heavy cylinder of volume 10 mº at its lower end. Find the decrease in length when the metal cylinder is immersed in a liquid of density 800 kg/m". 1mace 95 kg is attached to the lower end of a steel wire of length 5 m

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