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Derive a relation for the COP of the two-stage refrigeration system with a flash chamber as shown in Fig. 11-12 in terms of the enthalpies and the quality at state 6. Consider a unit mass in the condenser.
A wire is kept at ambient temperature while it is stretched by 200 mm by a force which rises from zero to 1.5 kN, the extension of the wire being directly proportional to the force applied. What is the work done by the wire
Design a lined trapezoidal channel to carry 20 m^3/sec on a longitudinal sloe of 0.0015. The lining of the channel is to be float-finished concrete (n=0.015). Consider (a) the best hydraulic section and (b) the section with side slopes 1.5:1 (H:V)
It is proposed to reduce the concentration acetaldehyde in aqueous solution from 55% to 5% by mass, by extraction with solvent S at 293K. If a counter current multiple contactor process is adopted and 0.025 kg/s of solution are treated with an equal ..
In an undisturbed soil formation, it is known that the dry soil weight is 115pcf. The specific gravity of the soil particle is 2.75.a) What is the saturation wet unit weight of the soilb) What is the submerged weight of the soil?
A complete mix activated sludge plant operates at design Q, with the reactor tank volume set by a nominal= 6 hours.. a) It was anticipated that it would operate at 25% RAS for an expected Xr= 2,000 mg/l. What would the actual be
Determine the magnitude and direction of the components of the reactions of the given truss. Determine the force in member AB. State whether member AB is in tension or compression
Determine the normal force, shear force and bending moment diagrams for the frame. Part AC is subjected to a distributed load which varies linearly in intensity
The heat exchanger consists of 12 m of copper tubing that is 2 cm in diameter with 19 return bends. The flow rate is 3 x 10-4 m3/s. Water enters at 20 C and exits at 80 C. The elevation difference between the entrance and the exit is 0.8 m.
A combined footing is subjected to an exterior 16 in. x 16 in. column abutting the property line carrying a total service load Pw = 300,000 lb and an interior column 20 in. x 20 in
Solve the following LP using the graphical method (graph sheets attached). Compute the value of the objective function and decision variables at optimality, and indicate which statement best describes the solution.
Given a water that contains 80 mg/L of glucose (C6H12O6) and 18 mg/L of ammonia (NH3): a. What is the carbonaceous oxygen demand (in mg 02/L) b. What is the nitrogenous oxygen demand (in mg 02/L)
Design a non-air-entrained concrete mix for a small job with a maximum gravel size of 3/4". Show the results as follows:
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