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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.
an auditorium has to be air-conditioned first by cooling and dehumidifying and then heating for summer when the outdoor
What is the kinetic energy (in Btu) associated with a 300 gm hockey puck flying at 120 mph? Assuming an ideal gas, calculate the specific volume in the appropriate units for (6 pts) : a. N 2 at 500 kPa and 900 K b. Neon at 8 kPa and 250 K c. Air at 1..
low level heat energy is exhausted continually to a large body of water at the rate of 22mjhour. assuming the lake
the work on a system with a mass of 100 lbm is known to be 10 btus. if there is no change in potential energy and the
estimate the tensile strength of the wire and the work required to take 1m3 of the wire to the point of necking. the
q1.a single stage reciprocating compressor has a swept volume of 0.4 litres and operates at 1440 rpm through a pressure
A pipe with OD 6.03cm, ID 4.93cm carries steam at 250deg C with h = 200 W/m^2.K The pipe is covered with 2.5cm of magnesia (85%) insulation followed by 2.5cm of polystyrene (k = .025 W/m.K The outer surface is exposed to air at T = 20 deg C with h = ..
A glass contains a mixture of water and ice cubes, with a total mass of 0.2 kg and at a temperature of 0 C. The mass of ice cubes is 1/3 of the mass of the mixture in the glass. As a result of heat transfer from the surroundings at 20 Celsius degree ..
A block weighing 80 N is resting on a plane inclined 20 deg to the horizontal. The coefficient of static friction is 0.5. Determine the friction force on the block. What is the maximum available friction force?
a very thin and long pipeline used for the transport of crude oil is buried in the earth such that its centerline is a
A small vapor-compression refrigeration unit is to be built into a recreational vehicle and is designed to operate on a 12-volt electrical system. The refrigerator has a cooling capacity of 500 W and uses R-134a. The refrigerant enters the compressor..
air in a piston cylinder assembly undergoes a thermodynamic cycle consisting of three internally reversible processes
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