When molding a large 1 mm thick, 300 mm by 20 mm, polystyrene ruler it is likely to have a 6k temperature imbalance between the mold halves. the thermal expansion of ps is b = 80um/m/k. the modulus for a characteristic demolding time is 1 gpa. estimate the amount of warpage for a 6k thermal mold imbalance. where are the maximum compressive residual stresses located in the ruler?

For the closed feedwater heater below, feedwater enters state 3 at a pressure of 2000 psia and temperature of 420 °f at a rate of ix10 ibhr. the feedwat extracted steam enters state 1 at a pressure of 1000 psia and enthalpy of 1500 btu/lbm. the extracted er leaves at an enthalpy of 528.7 btu/lbm steam leaves as a saturated liquid. (16) a) determine the mass flow rate of the extraction steam used to heat the feedwater (10) b) determine the terminal temperature difference of the closed feedwater heater