Asteam power plant operates on the reheat rankine cycle. steam enters the high-pressure turbine at 12.5 mpa and 550°c at a rate of 7.7 kg/s and leaves at 2 mpa. steam is then reheated at constant pressure to 450°c before it expands in the low-pressure turbine. the isentropic efficiencies of the turbine and the pump are 85 percent and 90 percent, respectively. steam leaves the condenser as a saturated liquid. if the moisture content of the steam at the exit of the turbine is not to exceed 5 percent, determine

(a) the condenser pressure,
(b) the net power output,
(c) the thermal efficiency.

Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.

The short distance from the objective lens to the object causes problems at high magnification. which of the following is the most serious? a. cleaning the object surface b. positioning the object c. reflection from the object surface. d. illumination of the object

Agas contained within a piston-cylinder assembly e end nation about same energy states, 1 and 2, where pi 10 bar, v undergoes two processes, a and b, between the sam 0.1 m3, ui-400 kj and p2 1 bar, v2 1.0 m2, u2 200 kj: process a: process from 1 to 2 during which the pressure- volume relation is pv constant process b: constant-volume process from state 1 to a pressure of 2 bar, followed by a linear pressure-volume process to +20 0 state 2 kinetic and potential energy effects can be ignored. for each of the processes a and b, (a) sketch the process on p-v coordinates, (b) evaluate the work, in kj, and (c) evaluate process the heat transfer, in kj