5 . 0 x 104 Nm-2
5 . 0 x 105 Nm-2
2 . 0 x 108 Nm-2
2 . 0 x 109 Nm-2
Correct answer is D
Y = stress/strain, but stress = 107Nm-2 (given). Strain = e/l0. = (10.05 - 10.00)/10.00 = 0.005 Thus Y = 107/0.005 = 2 . 0 x 109Nm-2
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