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A trapezoidal concrete channel has a constant bed slope of 0.0015, a bed width of 3.0 m, and side slopes of 1:1. It carries a discharge of 20 m3/s. The channel is a tributary to a river in which the existing flood level is 3.5 m above the channel bottom. Compute the water surface profile by the numerical integration method to a depth 5% greater than the uniform flow depth. α = 1.1 and n = 0.025.
How do you think the COP of the new system will compare to the COP of the old system?
A micro-channel of diameter 0.5 mm and length 750 mm is connected to a plenum. A fan produces a negative gage pressure of -1.5 inch H2O in the plenum and draws air at 20oC into the micro- channel.
Most compressors have a small diffuser at the exit to reduce the high gas velocity near the rotating blades and increase the pressure in the exit flow. What does this do to the stagnation pressure?
The symmetrical, two-hinged arch shown in Figure S10.7has a constant second moment of area, and the arch axis is defined by the coordinates given in the table. Determine the value of the horizontal thrust at the supports.
How is the load supported by asphalt concrete in the cases of tension and compression? Under what conditions is the asphalt concrete layer subjected to tension?
On the photograph of Problem 27.12, the image d of a third point D appears.Its elevation is hD = 1195 ft, and its photo coordinates are xd = 56.86 mm and yd = 63.12 mm. Calculate the area, in acres, of triangle ABD.
Compute the torque delivered to the shaft and the tangential and radial forces exerted on the shaft by the gear
For the steam power plant described in Problem 9.13, assume the isentropic efficiencies of the turbine and pump are 85% and 80%, respectively. Find the components' specific work and heat transfers and the cycle efficiency.
A pipe is to be installed under the ground on a bed of aggregate 6 in. thick. The entire weight on the aggregate from pipe and soil above the pipe is 1800 lbs. per linear foot of pipe. What is the pressure on the soil if theta is 45 degrees? Assum..
a hollow steel shaft with an outside diameter of 400 mm and inside diameter of 300mm is subjected to the torque of 300 Kn. The modulus of rigidity for the steel is 80 GPa.
A square footing 0.3 m by 0.3 m is placed on the surface of a dense cohesionless sand (unit weight = 18.2 KN/m^3) and subjected to a load test. If the footing fails at a load of 13.8 KN, what is the value of (degree) for the sand
when the sleeve and the rod are immersed in a pool of oil with dynamic viscosity of 0.095 kg/m.s, the effective weight of the sleeve is 4.5N. how fast will the sleeve slide down the rod
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