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At what Mach number will the normal shock occur in the nozzle of Problem 15.53 if the back pressure is 1.4 MPa? (Trial and error on Mx)
Problem 15.53
Air flows into a convergent-divergent nozzle with an exit area 2.0 times the throat area of 0.005 m2. The inlet stagnation state is 1.2 MPa, 600 K. Find the back pressure that will cause a reversible supersonic exit flow with M = 1 at the throat. What is the mass flow rate?
Have each class member write to two or three trade associations at the beginning of the term to request their lists of publications, and then have each send for some of the publications.
For the vector 100i+150j-300k kN determine its magnitude, the direction, angle alpha, beta, and gamma and the unit vector.
The evaporation rate from the surface of a 3650-acre lake is 100 acre-ft/day. Estimate the depth change in the lake in feet during a 1-year period if the net inflow to the lake is 25 cfs. Is the depth increasing or decreasing? What is the change in c..
Cooling at constant pressure followed by heating at constant volume. Calculate Q, W, change in U, and change in H for each of these processes, and sketch the paths of all processes on a single PV diagram.
compute the forces in couplers 1 and 100. Assume no slack in the couplers and neglect friction associated with the hopper cars.
Two level sections of an east-west highway (G = 0) are to be connected. Currently, the two sections of highway are separated by a 4000-ft (horizontal distance), 2 % grade.
Suppose a firm finds that the marginal product of capital is 60 and the marginal product of labor is 20. If the price of capital is $6 and the price of labor is $2.50, describe how the firm should adjust its mix of capital and labor
Each of the two dashpots has a viscous damping coefficient c = 58N*s/m In what ranges of speeds N can the motor be run for which the magnification factor will not exceed 2?
We requiere to design combined footing which will support a load of two columns ( the two columns rest on the same footing). The columns are squared, with a width of 12" and are at a distance of 15' from centre to centre. Determine the dimensions of ..
If a certain watershed received 1,250 mm of rain during a year, stored 150 mm of water in its soil mantle, and lost 400 mm of water downstream, how much water (in mm) was lost to the atmosphere (mainly through plants)
A 2 m high sandy fill material was placed loosely at a relative density of 47%. Laboratory studies indicated tht the maximum and minimum void ratios of the fill material are 0.92 and 0.53, respectively
determine the ratio of l/a for plastic hinges to occur simultaneously in each span and at the supports. For this condition, calculate the maximum value of w that may be supported.
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