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An insulated mixing chamber receives 4 lbm/s R-134a at 150 lbf/in.2, 220 F in a line with low velocity. Another line with R-134a as saturated liquid 130 F flows through a valve to the mixing chamber at 150 lbf/in.2 after the valve. The exit flow is saturated vapor at 150 lbf/in.2 flowing at 60 ft/s. Find the mass flow rate for the second line.
air in pistoncylinder at 200 kpa 600k is expanded in a constant-pressurenbspprocess to twice the initial volume state
a 10 lb bag is pushed off a and swings in a verticle plane and the end of rope l5. calculate and plot the swing of the
a proportional control system with a kp of 5 ft-lbsdeg controls a robot arm that is two feet long. what steady state
a refrigeration system is designed to operate between temperture limits of -10 c and 25 c. the power input to the steam
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The formula for the coefficient of performance 'COP' for air standard refrigeration cycle when we use cold air properties is not given in the text. Derive the expression for COP as function of the compression ratio similar to how the ideal Brayton..
energy addition in polytropic process in this case the initial air pressure is 750 psia and 750 f. the polytropic
one end of a tube is closed and the other is open. a 15 g projectile is placed near the closed end is fastened in place
a gas mixture consists of o2 and n2. the ratio of the mole numbers of nitrogen to oxygen is 31. this mixture is heated
Derive at least four concept designs to satisfy the given specification. Use short written descriptions and simple sketches to illustrate your ideas
steam flows through a horizontal adiabatic throttle which controls the flow to 25.0 ft3s and then through an adiabatic
he vapor compression heat pump operates at steady state using refrigerant 22 whose flow rate is 6kgmin. the heat pump
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