An ideal gas turbine cycle operates with two stages of compression and two stages of expansion. The pressure ratio across each stage of both the compressor and turbine is 3. Air enters each stage of the compressor at 300 K and each stage of the turbine at 1200 K. What is the back work ratio and the thermal efficiency of the cycle assuming the cycle also uses a regenerator with an effectiveness of 75%?

Explain the difference laminar and turbulent flow. explain it with the shear stress and the velocity profiles.

When at a point two solid phase changes to one solid phase on cooling then it is known as a) eutectoid point b) eutectic point c) peritectic point d) peritectoid point

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