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1. A convergent-divergent nozzle has a throat diameter of 0.05 m and an exit diameter of 0.1 m. The inlet stagnation state is 500 kPa, 500 K. Find the back pressure that will lead to the maximum possible flow rate and the mass flow rate for three different gases: air, hydrogen, and carbon dioxide.
2. Air is expanded in a nozzle from a stagnation state of 2 MPa, 600 K, to a static pressure of 200 kPa. The mass flow rate through the nozzle is 5 kg/s. Assume the flow is reversible and adiabatic and determine the throat and exit areas for the nozzle.
If r = 0.8 m, and determine the tension T in the string and the horizontal force Fθ exerted on the slider by the tube.
Water flows down a wide and shallow rectangular channel of concrete (n=0.015) laid on a slope of 0.004. find the depth and the rate of flow in SI units for critical conditons in the channel.
a tape is calibrated and found to measure 100.04ft between the 0- and 100-ft marks. what measurements should be laid out to establish a horizontal distance of 682.25ft
compare the efficacy of oxide-induced crack closure for aluminum alloys with that for steels solely on the basis of the volume of oxide produced on the fatigue fracture surface.
A small parking lot at a neighborhood park has 5 parking spaces, and the number of occupied slots at 9 AM is a binomial random variable, with p=0.75. If vehicle arrivals at the lot follow a poisson process, with arrival rate lambda
When stationary, vehicles are spaced at average distance headway of 6 m. It may be assumed that there is a linear relationship between speed and density. When the traffic flow approaching the roadworks is 3500 vehicles per hour
If both tanks are well-mixed and remain at constant volume, what is the steady-state concentration (in mg/L) of chromate (CrO42-) in the effluent water leaving the second tank?
determine the magnitude Fs of the tensile spring force in order that the resultant of Fs and F is a vertical force . Determine the magnitude R of this vertical resultant force.
A sample of natural glacial till was taken from below the groundwater table. The water content was found to be 52%. Estimate the wet density, dry density, buoyant density, porosity and void ratio. Clearly state any necessary assumptions.
calculate the height of the sight rails in metres at A, B, C, D and E, if a 3-m boning rod is to be used.Briefly discuss the techniques and advantages of using laser beams for the control of more precise work.
A 2-storey building using 12 column each floor made of reinforced concrete column size 15 x 15 cm, height 3 M. Each 1 M³ concrete requires reinforcement 137.5 Kg. Calculate reinforcement requirements for the column entirely!
If a certain EDM has a centering error of 3mm and a scalar error of 3ppm, what is the uncertainty in a observed distance of 1380.25 ft
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