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A heat pump cycle is executed with R-134a under the saturation dome between the pressure limits of 1.8 and 0.2 MPa. The maximum coefficient of performance of this heat pump is
(a) 1.1
(b) 3.6
(c) 5.0
(d) 4.6
(e) 2.6
the density of liquid water at 25 c is 997 kgm3 and the specific gravity of solid water ice at 0 c is 0.98. 100 kg of
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Is it a good approximation to consider helium at 250 kPa and 300 K as an ideal gas? Explain by considering it's reduced temperature and pressure (use Table A-2(Critical Constants)). At this temperature and pressure, how many moles of helium are in 0...
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describe the principle of operation for watts flyball governor. include the relevant block diagram and indicate the
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Drip irrigation is a means of getting water directly to growing plants with very little waste. One method uses a large-diameter polyethylene "mother" tube (10-15 mm i.d.) from which lead many small diameter polyethylene feeder tubes, called drippers,..
water vapor enters a turbine operating at steady state at 30 mpa 600 oc and expands adiabatically to 6 mpa. if the
Hemispherical end caps are welded to a cylindrical main body to form a propane storage tank. The tank has an inside diameter of d1=40in. and is to be subjected to a maximum internal pressure of p=120 psi. The allowable tensile stress in the wall of t..
determine the magnitudes of forces FA and FB acting on each chain and the orientation ? of FB so that the magnitude of FB is a minimum.
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