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The design of a masonry wall to support vertical compression loading is influenced by the same factors that affect the design of all compression elements. One of these factors is the extent of rotational restraint at the top of the wall. Explain how and why the rotational restraint at the top of a loaded wall is different if the load is due to a concrete slab which is sitting on the wall, compared to if the loads are being applied by, say, timber trusses which are sitting on the wall.
What is the average length of queue, the average time spent in the system, and the average waiting time in the queue?
determine the preassure in psi at a depth of 20 ft below the free surface of a body of water and find the absolute pressure when the barometer reads 29.9 inches of mercury.
A coal-fired power plant produces a net electrical output of 500 MW. The composition of the coal burned is C= 72 %, H= 6 %, S= 3.5 %, O= 6 %, N= 1 %, and ash= 12 % by weight. It's heating value (HV) is 30200 kJ/kg. The net thermal efficiency is 36..
a storage tank has a diameter of 80 ft, a height of 25ft and contains oil to a height of 15ft. the suction pumps, which can handle 15000bbl/d, are started, but the safety valves are clogged and a vacuum is drawn in the tank.
where u(t) is in vehicles per minute and t is in minutes. When will the queue clear?
A contractor has installed a silt fence around an area that is semi-circular and level to prevent soil from the construction site entering nearby streams. The diameter of the semi-circle is 1000 feet.
Draw the Bending Moment and Shear Force diagrams for the girder and calculate the maximum tension in the cable.
An airplane flies at a speed of 360 mph at an altitude of 5000 ft. If the boundary layers on the wing surfaces behave as those on a flat plate, estimate the extent of laminar boundary layer flow along the wing in feet.
5,000 gpd of primary sludge at 5% solids (50,000 mg/l) and 5,000 gpd of biological treatment sludge (10,000 mg/l) are blended, then thickened to 8% solids. What volume of supernatant is returned to the reactor
of 2640 psi with a factor of safety of 2.0 with respect to yielding. the yield stress of the steel is 65,000 psi in tension and 32,000 psi in shear. the diameter of the tank is 7.0 in. the minimum required wall thickness is 0.289 in.
A stockpile of gravel that has a water content of 6% is rained on so that its water content increases to 9%. Compute the difference in the weights of dry gravel in a 10 ton truckload taken from the pile before and after the rain.
The section of the plywood in the 3rd quadrant is sawed off and the resulting piece is then glued squarely over the 4th quadrant portion of the plywood with glue of negligible weight.What are the x- and y-coordinates of the resulting center of gra..
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