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Question 8 A copper tube having 45mm intemal diameter and 1.5mm wall thickness is closed at its ends by plugs which are at 450mm apart.

Question 8 A copper tube having 45mm intemal diameter and 1.5mm wall thickness is closed at its ends by plugs which are at 450mm apart. The tube is subjected to intemal pressu0 re of 3MPa. For copper properties of modulus of elasticity 100GPa and Poison ration 0.3 , calculate: i) The change in length between the plugs [7 marks] ii) The new outer diameter of the tube [6 marks]

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