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A refrigerator uses a compressor that employs R-134a as the refrigerant. Determine the power requirement (W) and volumetric flow rate (ft3/min) for the compressor if the mass flow rate is 2.5 lbm/s, the inlet refrigerant is saturated vapor at a temperature of -10°F, and the exit refrigerant is at a pressure of 120 psia and a temperature of 140°F. Assume that the compressor is adiabatic.
Knowing that the pipe has inner and outer dimensions equal to 35 and 42 mm, respectively, detemine the normal and shearing stresses at point a and point b.
find the average velocity of flow at section B, and the pressure difference between sections A and B.
what is value of convective heat transfer coefficient for pebble glass in air medium?
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Lawn mower engines normally have finned surfaces directly attached to the engine block, with no radiator, in order to achieve the required cooling. Why might the cooling strategies be different in these two applications?
calculate the radius of an silver atom in cm given that ag has an fcc crystal structure a density of 10.5 gcm3 and an
a spring-mass is excited by a force f0sinomegat. at resonance the amplitude is measured to be 0.58 cm. at 0.80 resonant
Consider a magnet moving in a coil of N, turns. This system can be modelled as mass spring damper system. The damping coefficient consist of both mechanical and electromagnetic damping. How can I calculate the mechanical electromagnetic damping?
initially 0.05 kg of air is contained in a piston-cylinder device at 200 degc and 1.6 mpa. the air then expands at
Use the bisection method to determine the drag coefficient (cd) needed so that a 80 kg bunjee jumper has a velocity of 36 m/s after 4 s of free fall.
a cylindrical bar of aluminum 19 mm 0.75 in in diameter is to be deformed elastically by application of a force along
hot air is contained in a vertical frictionless piston-cylinder device.the piston has a mass of 4 kg and a
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