Q2. A tensile specimen is machined to a gage diameter of 12 mm. When subjected to a tensile test, the following results were found: (i) yield strength = 18000 N and (ii) area reduction at the load = 20% through uniaxial tension (pulling). The specimen has the following relationship: J = Ken and n = 0.45. [2007 midterm] a. What is the yield stress for this specimen? b. Find value K based on (a) where n = 0.45. c. Calculate the toughness involved. (Use the value obtained from (b))