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Gaseous oxygen (99% pure, molar basis) is to be produced at a rate of 350ft^3/hr in a Linde single column plant. The column operates at a pressure of 1 atm. Air leaves the compressor at a pressure of 10 atm. The Nitrogen product is to have 91 percent purity. Dry compressed air enters the heat exchanger at 70 degrees F and the outgoing products leave the heat exchanger at 60 degrees F. You may assume that the inlet air and gaseous products behave as ideal gases near room temperature and at atmospheric pressure. Determine a) the volume of air in ft^3/hr which must be compressed, b) the oxygen yield (ratio of moles of oxygen produced to moles of oxygen available), and c) the temperature at which the air must leave the heat exchanger.
A 4 X 8-ft solar collector has water circulating through it at the rate of 1.0 gallon per minute while exposed to sunlight with intensity 300 Btu/ft^2-hr.
What is the length of a 2 degree increment along a (A) meridian and (B) parallel at 45N and 115W. Assume the radius of Earth is 6370 km.
A weightless piston is placed on the liquid surface and the water level stabilizes (also in the small tube) to a level of h. Next, a weight of 10 kg is placed on the piston causing the liquid in the small tube to rise.
Construction dewatering plays are very large role in the todays construction arena. Discuss the role water conditions plays in the planning and design of a temporary earth support system.
A water column in a glass tube is used to measure the pressure in a glass pipe. The tube is 1/4 in. in diameter how much of the water column is due to the surface tention effects
A tensile test was performed on a metal specimen having a circular cross section with a diameter of 0.50 inch. The gage length is 2 inches. For a load of 13.5 kips, the elongation was 4.66 x 10-3 inches.
The curve is to be redesigned for a 70 mph design speed in the year of 2025. Vehicle braking technology has advanced so that the recommended design deceleration rate is 25% greater that the 2011 value used to develop
If a truck has a capacity of 24m^3 (Heaped) and 18m^3 (struck), with a total empty weight of 31600kg (truck), and needs to move soil at a density of 1850kg.m^3 (Bank) with a swell of 41%
Suppose in 100 years energy consumption is still 330 Ej/yr, but coal supplies only 20 percent of total demand, natural gas supplies 30 percent, and oil 10 percent. The remaining 40 percent of demand is met by noncarbon-emitting sources.
Design a series of closely spaced parallel box beams that will support an asphalt road surface over a 10 foot wide, 40 foot long span. The hollow box beams are made of concurred and imbedded No. 8 steel rods (1 inch dia.).
4 in diameter pipeline 200ft long discharges water from nozzle with 2 in diameter jet at an elevation which is 100ft below the water level of supply reservoir. find flow rate through pipe
At the bottom, an opening allows water to drain out at a rate, in lbm/s, that is proportional to H(t), the instantaneous height of water in the barrel, in ft: rate of water leaving from bottom = 9*H(t) .
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