Amaterial is subjected to a horizontal tensile stress of 90 mpa, a vertical tensile stress of 120 mpa and a shear stress of 75 mpa. find: . the principal stresses .the maximum shear stress the shear stress, acting alone that would produce the same the single tensile stress, acting alone that would produce the same principal stresses maximum shear stress

An open feedwater heater operates at steady state with liquid entering at inlet 1 with t? = 40°c and pl = 1 .2 mpa. water vapor att2-200°c and p2 = 1.2 mpa enters at inlet 2. saturated liquid water exits with a pressure of pa 1.2 mpa. neglect heat transfer with the surroundings and all kinetic and potential energy effects, determine the mass flow rate of steam at inlet 2 if the mass flow rate of liquid water at inlet 1 is given as 2 kg/s.