The state of strain at the point has components of εx=-100(10-6), εy=-200(10-6), and γxy=100(10-6). use the strain-transformation equations to determine (a) the in-plane principal strains and (b)the maximum in-plane shear strain and average normal strain. in each case specify the orientation of the element and show how the strains deform the element within the x-y plane.

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

Apiston-cylinder device contains 0.1 m3 of liquid water and 0.9 m3 of water vapor in equilibrium at 800 kpa. heat is transferred at constant pressure until the temperature of water reaches 350 °c. determine (a) the quality of water at the initial state (b) the work associated with this process, (c) the heat associated with this process.

How to increase the thermal officiency of an ideal simple rankino cycle? among these methods, which one is the best and why?