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A 4.40-ft^3 rigid tank contains saturated refrigerant-134a at 100 psia. Initially, 26 percent of the volume is occupied by liquid and the rest by vapor. A value at the top of the tank is now opened, and vapor is allowed to escape slowly from the tank. Heat is transferred to the refrigerant such that the pressure inside the tank remains constant. The valve is closed when the last drop of liquid in the tank is vaporized. Determine the total heat transfer for this process.
Qin = _______ Btu (Round to the nearest integer)
Air at 250 kPA and 15C is being forced into a tire, which has a volume of 0.5m^3, at a velocity of 60 m/s through a 6 mm opening. Find the rate of change of the density in the tire.
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At a section where the diameter is 4 in, methane flows with the veloctiy of 50ft/s and a pressure of 85 psia. At a downstream section, where the diameter has increased to 6 in, the pressure is 45 psia. Assuming the flow to be isothermal, compute the ..
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Refrigerant 134a flows at steady state through a horizontal tube with inner diameter of 0.05 m. The refrigerant enters the tube with a quality of 0.1, temperature of 36 ?C, and velocity of 10 m/s. The refrigerant exits the tube at 9 bar as a saturate..
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a passive solar house requires an average heating power of 8.4 kw in the winter. it stores energy in 10 tonnes 10000kg
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