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Consider a two-stage cascade refrigeration cycle and a two-stage compression refrigeration cycle with a flash chamber. Both cycles operate between the same pressure limits and use the same refrigerant. Which system would you favor? Why?
What is the average length of queue, the average time spent in the system, and the average waiting time in the queue?
The mass of the compacted soil specimen is 1.91 kg and its water content is 14.5%. Using a specific gravity of solids of 2.66, compute the degree of saturation, density and unit weight of the compacted soil
When 0.3 m^3/s water flows through a 150 mm constriction in a 300 mm horizontal pipeline, the pressure at a point in the pipe is 345 kPa, and the head loss between this point and the constriction is 3 m.
A total of 13,610 kg/h of air at 1 atm abs pressure and 15.6C is to be heated by passing over a bank of tubes in which steam at 100C is condensing. The tubes are 12.7mm OD, 0.61 m long, and arranged in-line in a square pattern with Sp=Sn= 19.05mm.
Create a function called [polygon] that draws a polygon in a polar plot. Your function should have a single input paramter - the number of sides.
Plot the turbulence intensity profiles for the velocity components and compare the results from (c) with the actual Durst curve assuming the mean speed is like an hourly speed.
What is the settling velocity of a floc of diameter 0.15 mm and density 2.12 g/cm3 in water. Will the floc from problem 4 be completely removed in a typical sedimentation basin if alum was used as the coagulant.
The suspended load exerts a force F = 600 lb at A and bar OA weighs 200 lb. Assume that the bar's weight acts at its midpoint. Determine the tensions in the cables and the reactions at the ball and socket support O.
Determine rqd impeller diameter, Qactual, h_p-actual, E, BHP required for...., NPSH_R, max elevation at which the pump can be installed.
An 180 m long 100 mm diameter compressed air pipeline is to be run from a stationary compressor to an air-track drill which requires a flow of 780 l/sec. The pipeline contains 2 large radius bends (R=2d) ,and 4 half closed gate valves.
The volume of the bend is 0.1 m3. The steel of the bend material weighs 51 kg. Neglecting friction or other losses in the pipe, what is the tension force in the bolts holding the bend in place
After drying in the oven, it weighs 4.44 kg. The relative density of the grains is 2.70. Determine the degree of saturation, void ratio, porosity and moisture content of the soil in its natural state.
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