Assume a 2D element in the xy plane, and z is the thickness axis. (1) List all the non-zero stress and strain components in a plane stress condition. (2) Specify the generalized Hooke’s Law for plane stress condition (3) List all the non-zero stress and strain components in a plane strain condition. (4) Specify the generalized Hooke’s Law for plane strain condition

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