The graph below shows the tensile stress against strain for a glass fibre. stress/10°Pa 100 80 60 40 20 10 15 strain/10-4 Use this graph to calculate (i) The young modulus for glass The strain energy per unit volume just before fibre breaks, i.e where the graph line ends. State your answer with suitable SI unit. (iii) The extension just before a fibre ofunstretched length 0.50 m hreaks
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