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A closed tank, V = 10 L, containing 5 kg of water initially at 25°C, is heated to 175°C by a heat pump that is receiving heat from the surroundings at 25°C. Assume that this process is reversible. Find the heat transfer to the water and the change in entropy
refrigerant 134-a is contained in a 4 ft3 tank at 160 lpfin2. at the beginning the saturated vapour occupies a volume
Crank AB of the linkage shown rotates clockwise at 300 rpm. Using graphical method, determine the velocity of point B, C, D, and E.
air at 20 c 40 rh is mixed adiabatically with air at 40 c 40 rh in the ratio of 1 kg of the former to 2 kg of latter
a rigid tank of volume 2m3 initially contains steam at 3bar 240oc. the tank is connected to a large steam linecarrying
1 steam at 3 mpa and 400 c enters an adiabatic nozzle steadily with a velocity of 40 ms and leaves at 2.5 mpa and 300
a gas turbine has a pressure ratio of 15. it is connected to an electric generator with an efficiency of 95. the
successive maximum displacements of a spring-mass-dashpot system shown by fig. 19.10 of vector mechanics for engineers
a closed system contains 0.8 kg of air initially at 155 kpa with a volume of 0.45 m3. the system undergoes a polytropic
a flat-bottomed barge 25 m long and 10 m wide submerged to a depth of 1.5 m is to be pushed up a river at a rate of 8.6
at steady state a device receives a stream of saturated water vapor at 210 degrees c and discharges a condensate stream
burning one metric ton 1 000 kg of coal can yield an energy of 3.30x1010j. fission of one nucleus of uranium235 yields
a thin-flat plate having a length of l 10 cm is heated by a constant-heat flux from the bottom and cooled by an air
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