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Consider the irreversible process in Problem 6.182. Assume that the process could be done reversibly by adding heat engines/pumps between tanks A and B and the cylinder. The total system is insulated, so there is no heat transfer to or from the ambient. Find the final state, the work given out to the piston, and the total work to or from the heat engines/pumps.
Problem 6.182
Two tanks contain steam and they are both connected to a piston/cylinder, as shown in Fig. P6.182. Initially the piston is at the bottom, and the mass of the piston is such that a pressure of 1.4 MPa below it will be able to lift it. Stream in A is 4 kg at 7 MPa, 700?C and B has 2 kg at 3 MPa, 350?C. The two valves are opened, and the water comes to a uniform state. Find the final temperature and the total entropy generation, assuming no heat transfer.
World population 10,000 years ago has been estimated at about 5 million. what exponential rate of growth would have resulaed in the population in 1850 , which is estimated at 1 billion had that rate continued
The background concentration of atmospheric lead is 0.1 ug/m^3. During a typical hot day in Leadville the mixing height is 500m and the average wind speed is 1.9m/s.
What would be the tensile proof force in newtons (N) in a machine screw having a major diameter of 4 mm with standard fine threads if it is made from steel having a metric strength grade of 8.6?
Water is pumped from the tank 1 to tank 2 as shown below. The suction side pipe is nominal 4, schedule 40, 24 ft long, f = 0.018, and the discharge pipe is nominal 3 ½ , schedule 40, f = 0.019, and is 400 ft long
Compare the effectiveness of the zinc coating with a typical epoxy coating on reinforcement. How does the epoxy coating protect reinforcement and what happens if the coating is nicked.
A 12 foot W14 X 22 column with pinned ends is axially loaded. The max load it can carry is 34 ksi. Determine (a) Euler buckling stress, (b) Euler buckling load. (A = 6.49 in^2) (ry = 1.04 in) (Iy = 7.00 in^4)
A W14x34 section is used as a simply supported beam over a span of 20 ft. The beam is loaded with a concentrated live load of 10 kips at the center of its span, in addition to its own weight.
A permeameter with a cross-sectional area of 400 cm2 contains 3 soils in 50 cm thick layers. A total head difference of 2.0 metres results in a flow rate of 100 cm3/s. The head loss through the top layer of soil is 50 cm.
A sound wave is observed to travel through a liquid with a speed of 1500 m/s. The specific gravity of the liquid is 1.5. Determine the bulk modulus of elasticity, Ev, for this fluid.
Write the mass balance equation for an ideal 1D plug-flow stream under steady state conditions with a first-order decaying substance. Solve for the concentration as a function of the concentration x=0
If a source of groundwater gets contaminated with a DNAPL and another one gets contaminated with a LNAPL, which one will be harder to remediate and why ?
A tensiometer is used to measure a compacted soil in the field that has a matric suction of 200 kPa under atmospheric conditions. The pore-water pressure measurement in the tensiometer reaches
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