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Air enters a nozzle at 30 psia, 630 R, and a velocity of 450 ft/s. Assuming isentropic flow, determine the pressure and temperature of air at a location where the air velocity equals the speed of sound. What is the ratio of the area at this location to the entrance area?
Estimate the cp and cv of the nitrogen at this state, using enthalpy and internal energy data from Table A-18, and compare them to the values listed in Table A-2b.
Determine the COD, carbonaceous BOD, and nitrogenous oxygen demand of a 100 mg/L solution of urea (N2H4CO)
A regular hexagonal pyramid has an upper base edge of 16 ft. and a lower base edge of 28 ft. if the volume of the frustum is 18041 ft^3., find the lateral area of the frustum.
A researcher is conducting an evaporation study using a 5ft diameter evapoartion pan with 75lbs of water. Over the course of 3days, she added another 6lbs of water and at the end of 3days, there was 67lbs of water remaining. A nearby rain gage record..
A lake has an area of 1000 ha. The concentration of the toxicant PCB in rainfall is 100 ng/l and the average annual rainfall is 70 cm. What is the average annual mass loading of PCB from the precipitation to the lake in kg/year.
Normal human skin and clothing temperature indoors is approximately 30 o C. In order to maintain this temperature, one student sitting in a classroom gives off heat at a rate of 14 watts per degree K
Finally, the wreckage is removed, and the freeway is restored to full capacity (4000 veh/h) at 8:31 a,. Assume D/D/1 queuing to determine time of queue dissipation, longest queue length, total delay, average delay per vehicle, and longest wait of ..
A rig accelerates a load of 200000 lbf from zero to 60 ft/min in 5 seconds. compute the load shown on the hook load indicator.
Given simply supported beam with an overhang. The beam is 12 inches wide by 24 inches deep, and the slab is 6 inches deep. use a roof live load of 20 psf, and a concrete density of 150 pdf. the beams are spaced 15 feet apart.
the motorcycle is traveling at 1 m/s when it is at A at the bottom of the ramp. If the speed is then increased at v=0.1 m/s^2, determine its speed and acceleration at the instant t=5s
For the vector 100i+150j-300k kN determine its magnitude, the direction, angle alpha, beta, and gamma and the unit vector. magnitude = 350 kN angle alpha is suppose to = 59 degrees
The 1500kg car has a velocity of 30 km/h up the 10 percent grade when the driver applies more power for 8 s to bring the car up to speed of 60 km/h.
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