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A trapezoidal channel cut into rock has a bottom width of 4 ft, side slopes of 1:1 and a channel slope of 0.0005. What is the critical slope of the channel.
An equal-tangent crest vertical curve has a 50 mi/h design speed. The initial grade is +3%. The high point is at station 33+37.43 and the PVT is at station 37+18.26. What is the elevation difference between the high point and the PVT?
In magnetic tape recording, the tape is subjected to tension while it is guided along its path. Tension in the tape causes elastic deformation that results in slight changes in length of the domains on which information is stored.
After injecting 50 MMSCF (14.7 psia and 60 oF), the pressure increase from 2500 to 3500 psia. Deviation factors for the gas are 0.90 at 3500 and 0.80 at 2500 psia and the bottom-hole temperature is 160 oF. What is the cubic feet of gas storage spa..
A MH at an intersection has an inflow from three 8-inch PVC (n = 0.01) sanitary sewer pipes laid at minimum slope converging at an intersection and one pipe taking the flow from those three further downstream.
two 10 mm thick steel plates are fastened together by means of two 20mm bolts that fit tightly into the holes. if the joint transmits a tensile force of 45 kn determine the average normal stress in the plates at a section where no holes occur
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.
Consider a high-rate sedimentation basin with tube settlers. The basin is 120 feet long and 30 feet wide. The length of the basin covered by tube settlers is 90 feet. The water depth is 15 feet.
At a certain location on the surface of an engineering component, the material is in a state of plane stress with principal stresses of fmax = 150 MPa and fmin = 50 MPa (both tensile). If the yield strength of the material is Y = 350 MPa
A circular bar of magnesiuen alloy is 750 mm long. The bar is loaded in tension to an elongation of 6.0 mm, and the load is removed. (a) what is the permanent set of the bar (b) if the bar is reloaded, what is the proportional limit
The sand particles range in diameter from 0.04 to 2.0 mm with a specific gravity of 2.65. The wastewater discharge rate is 1400 m3 /d at 20°C. Design a settling tank to remove all the metal and sand particles.
A fine-bubble aeration basin has a flow of 21.5 mgd, an influent BOD of 180 mg/l, 31 mg/l of mmonia, and effluent of 10 mg/l. During the winter, the wastewater temperature of 14.8 degrees C does not nitrify.
The aluminum block has a rectangular cross section and is subjected to an axial compressive force of 8kip. If the 1.5-in side changed its length to 1.500132 in., Determine Poisson's ratio and the new length of the 2-in side.
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