Atorque of 6000 ft lb is applied in a torsion test on a thin walled tubular specimen whose radius = 1.5 in, wall thickness = 0.125 in, and gage length = 2.0 in. this causes an angular deflection = 1. determine (a) shear stress, (b) shear strain, and (c) shear modulus, assuming the specimen had not yet yielded. (d) if the specimen fails at a torque = 8000