A stress-strain diagram is shown, what is most nearly the modulus of elasticity of the material? (Hint use Hooke's law (=E), where () is the stress, (E) is the strain & (E) is modulus of (2) elasticity) (MPa) 500 400 250 150 0.00075 0.02 0.0013 0.2 0.25 0.28 GPa 20 GPa 80 GPa 100 GPa 200 GPa 300