Consider a cube of material of edge length 1 (initial volume is 1) loaded uniaxially by a stress o = 150 MPa. Young's modulus is E = 70 GPa, Poisson's ration is v = 0.3 and the yield stress is oy= 70 MPa. Compute the total volume change at o= 150 MPa. Note that the applied stress state is above the yield point.

A)-in the process of engineering design, explain the contribution of material selection. b)- explain the procedure of synthesis as is employed in engineering design. c)- is there any relationship between ergonomics and engineering design? explain. d)- safety consideration in engineering design includes human, product and the enviroment . explain how safety will be incorporated into the design?