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An adiabatic capillary tube is used in some refrigeration systems to drop the pressure of the refrigerant from the condenser level to the evaporator level. The R-134a enters the capillary tube as a saturated liquid 50o C, and leaves at -20o C. Determine the quality of the refrigant at the inlet of the evaporator.
part a air is compressed at constant temperature from standard temperature and pressure and volume 258 in3 to a volume
a piece of electronic equipment that is surrounded by packing material is dropped so that it hits the ground with a
the decision at hand is replacing the high grade muffler system with one made with low grade cheaper materials. the
fully developed laminar flow occurs between two horizantal parralel plates. the distance between the plates is 0.25
a paddle wheel is inserted in a 0.6 m3 rigid well-insulated tank which is filled with 2 kg of air. the paddle wheel
Wheel of radius r is driven by an arm OA. It is driving (without slip) wheel of a radius r2 which is fixed to a drum of radius r1. Load G is attached to the rope which winds on the drum. Calculate the speed of load G if the arm OA moves at n rev/m..
the thermometer in this problem a thermometer has a time constant of 10s and behaves as a first-order system. it is
a pelton wheel is used to produce hydroelectric power. the average radius of the wheel is 1.83 m and the jet velocity
2kg of air in a closed rigid tank is fitted with an electrical resistor. the resistor draws a constant current of 10
consider a single sheet flat plate collector where the ambient temperature is 25c the insolation is 900 wm2 and
a dish of liquid water is placed on a table in a room. after a while all of the water evaporates. taking the water and
A balloon behaves so the pressure is P = C2V1/3, C2 = 100 kPa/m. The balloon is blown up with air from a starting volume of 1 m3 to a volume of 3 m3. Find the final mass of air assuming it is at 25oC and the work done by the air.
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