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To what pressure should the steam in Problem 15.40 expand to reach Mach 1? Use constant specific heats to solve this problem.
Problem 15.40
Steam flowing at 15 m/s, 1800 kPa, 300?C, expands to 1600 kPa in a converging nozzle. Find the exit velocity and area ratio Ae/Ai.
A 0.5 m diameter concrete pipe (5.0 cm wall thickness with rigid pipe walls) carries water 600 m before discharging it into another reservoir. The surface elevation of the downstream resevoir is 55 m lower
A gas stream contains 18.0 mole% hexane and the remainder nitrogen. The stream flows to a condenser, where its temperature is reduced and some of the hexane is liquefied. The hexane mole fraction in the gas stream leaving the condenser is 0.0500.
A 200ft tape is hung in catenary. It is supported at the 80ft mark the tension is 20lbf and the weight of the tape is 3 lbf 5 0z. The measured distance is 187.01 what it the distance after adjusting for sag?
If the systems will reduce insurance claims by $100,000 two years from now, how much should the company be willing to spend now, it is uses an interest rat of 12% per year
If the instrument and rod target heights were equal, calculate the difference in elevation from A to B.
Steam at a pressure of 1 MPa and a temperature of 400?C expands in a nozzle to a pressure of 200 kPa. The nozzle efficiency is 90%, and the mass flow rate is 10 kg/s. Determine the nozzle exit area and the exit velocity.
A river is 6 m deep. The riverbed material has a saturated unit weight of 19.5kN/m3. What is the effective vertical stress 12 m below the water surface
Calculate the elongation of a steel bar 4 feet in length and 4 inches in diameter when subjected to a force of 2.5 kips. Assume that the bar remains in the elastic region with E=30 ksi.
The tangent function is defined as than (t)=sin(t)/cos(t). This expression can be evaluated to solve for the tangent as long as the magnitude of cos(t) is not too near to 0
A dam project specifies 97% compaction. Lab tests on the soil being used indicate that it has a maximum dry density of 1900 kg/m 3 at an optimum water content of 13.2%.
A rectangular steel bar has cross-sectional dimensions of 12mm by 25mm and is 210 mm long. Assuming that the bar has pinned ends and is made from AISI 1141 OQT 1300 steel, compute the critical load when the bar is subjected to an axial compressive lo..
Why did Romans use elevated aqueducts instead of pipes to covey water?
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