Air flows through a frictionless, adiabatic, converging-diverging nozzle. The air in the reservoir feeding the nozzle has a pressure and temperature of 700 kPa and 500K respectively. The ratio of the nozzle exit to throat area is 12. A normal shock wave stands in the channel where the upstream Mach number is 3.0. Required:
Calculate the Mach number, the static temperature, and static pressure at the nozzle exit 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

Aquick transition of the operating speed of a shaft from its critical speed will whirl amplitude. (a) increase (b) limit (c) not affect (d) zero

Determine the damped natural frequencies and the steady state response of a decoupled damped forced two degrees of freedom system. 10ä1 + 2q1 20q1 10 cos t; 10q2 +4q2 + 40q2 10 cos t