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The condenser in a refrigerator receives R-134a at 700 kPa and 50C, and it exits as saturated liquid at 25 C, The flow rate is 0.1 kg/s,and the condenser has air in at an ambient temperature of 15 C and leaving at 35 C. Find the minimum flow rate of air and the heat exchanger second-law efficiency.
Roman technology and engineering. Technology and engineering were among Rome's most famous achievements. Describe and explain the importance of Roman technology and engineering
The allowable shearing stress is 15 ksi in the steel rod AB and 8 ksi in the brass rod BC. Knowing that the torque of magnitude T=10 kip * in. is applied at A, determine the required diameter of a) rod AB, b) rod BC.
An embankment for a highway 30m wide & 1.5m in a compacted thickness is to be constructed from a sandy trucked from a borrow pit. the water contenet of the sandy soil in the borrow pit is 15%& its void ratio is 0.69.
given bulk density as 1300kg/cubic meter and field capacity as 22% by weight and permanent wilting point as 10% by weight calculate available water capacity.
Show or formulate the shear and bending moment expressions for each board, and plot/draw the shear and bending moment diagrams of the boards.
The 75 lb block is released from rest 5 ft above the plate. Determine the compression of each spring when the block momentarily comes to rest after striking the plate.
Light-Voice Controlling System. We are planning to design a new light-voice controlling system. The voices will basically coordinate the crossing of a road by blind people. Suppose the crossing will be operated by two coordinated systems
Determine the rate at which heat is added in the boiler, the power required to operate the pumps, the net power produced by the cycle, and the thermal efficiency.
For energy conservation, materials with a high thermal capacity are effective in climates in which the heat flow through the building envelope is:
You are a real estate salesperson working for Good Earth, Realtors, Inc. You receive 50 percent of all commissions received by the firm (net of MLS fees) for which you were either the listing agent or the selling agent.
Calculate the overall modulus of the composite, explaining your calculations and the assumptions you have made when it is loaded:
Determine the number of completely mixed bioreactors (detention time of 45 min each) that would be required to meet the phenol discharge limit of 5 mg/L. The first-order removal rate constant is equal to 6.1 hr -1
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