1. A) For a steel specimen, the stress at which plastic deformation begins is 400 MPa, and the modulus of elasticity is 207 GPa. (a)What is the maximum load that may be applied to a specimen with diameter of 8.5 mm without plastic deformation? (b) If the original specimen length is 80 mm, what is the maximum length to which it may be stretched without causing plastic deformation?

B) A cylindrical specimen of a "Panther-alloy" is stressed in compression. If its original and final diameters are 10.000 and 10.025 mm, respectively, and its final length is 52.96 mm, compute its original length if the deformation is totally elastic. The elastic and shear moduli for this alloy are 105 GPa and 39.7 GPa, respectively.