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A closed, frictionless, piston-cylinder assembly contains 4 lbm of H20. Beginning with an initial volume of 10 ft^3, the H2O is compressed slowly until the volume has been reduced to 10 percent of the initial volume. During the process, heat transfer from the H2O occurs at such a rate as to keep the temperature constant at 300 degrees F. determine the magnitude and direction of the work and the heat transfer during the process.
air from a line at 12 mpa 15 deg c flows into a 500-liter rigid tank that initially contains air at 100 kpa and 15 deg
at a surface cutting speed of 190 mmin the productive tool life was 60 minutes. at a surface cutting speed of 225 mmin
for this wye fitting which lies in a horizontal plane the cross-sectional areas at sections 1 2 and 3 are 1 ft2 1 ft2
refrigerant 134a at 10 bars 38oc flows at 10.0 kgs through a heat exchanger leaving at 9.0 bars and 80oc. it exchanges
1. r-134 enters the condenser of a window air conditioning unit at 800 kpa and 35 c and leaves as a saturated
suppose that the mass in a mass-spring-dashpot system with m10 c9 and k2 is set in motion with x00 and x05 a find the
two kg of air is contained in a piston-cylinder assembly. the initial volume is 0.01m3 and pressure is 10 bar. the air
The brake of a vehicle can be modeled as a solid of mass m , with specific heat c and uniform temperature T , initially equal to the ambient temperature T0. During the braking process the brake receives work input W, temperature rises to T and heat t..
a 1kg fluid is compressed reversibly according to a law pv0.25 where p is in bar and v is in m3kg. the final volume is
The long bolt passes through the 4 in. thick plate. If the force in the bolt shank is 50 lb, determine the average normal stress in the shank, the average shear stress along the cylindrical area of the late defined by the section lines a-a, and the a..
a steam turbine operates at steady state. steam enters the turbine at 2.0 mpa and 350 degc with a specific enthalpy of
10 kg of water in a piston cylinder exists as a saturated mixture at 120 kpa with quality 40. the water is now heated
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