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Repeat Prob. 7.56 for upstream pressures of 220 and 400 kPa.
Prob. 7.56
A sonic nozzle is to be used to measure the mass flow of nitrogen at low-velocity upstream conditions of 50?C and 800 kPa. The discharge coefficient is 0.97 ± 0.5 percent. The upstream pressure is measured with a transducer having an upper range of 1 MPa and an uncertainty of ±1 percent of full scale. The upstream temperature is measured with a thermocouple having an uncertainty of ±1?C. The nozzle has a throat diameter of 2 cm and discharges into a large chamber maintained at a pressure of 100 kPa. Calculate the flow rate of nitrogen in kg/s for these conditions and its uncertainty.
The segments of pipe and couplings used for drilling an oil well 15,000 ft deep are made of A-36 steel weighing 20 lb/ft. They have an outside diameter of 5.50 in. and an inside diameter of 4.75 in
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salary 65000 per year, jane plans to retire in 25 years. Annual anticipated increaase is 3000 a year. she plans to deposite 5% of her yearly salery, into retirment fund that earns 7% intrest compounded daily.
How long can the turbines produce 380.0 MW of power from the release of the mass of stored water calculated above? Assume the water sustains a friction loss of 39.5 m2/s2 on the way down to the turbine.
(a). Find the sum of moments about point E due to this system of forces (b). Find the sum of moments about point A due to this system of forces (c). Find the resultant couple moment acting on the beam
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