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1.A paved parking lot section has a uniform slope over a length of 100 m (in the flow direction) from the point of a drainage area divide to the inlet grate, which extends across the lot width of 30 m. Rainfall is occurring at a uniform intensity of 10 cm/hr. If the detention storage on the paved section is increasing at the rate of 60 m3/hr, what is the runoff rate into the inlet grate?
2.What mass of lead nitrate [Pb(NO3)2] must be dissolved in 1 L of water to produce a solution that contains 20 mg of lead ions? Assume 100% ionization.
3.Given a V-shaped channel with a bottom slope of 0.001, a top width of 12ft, and a depth of 6 ft, determine the velocity of flow. Find the discharge in cfs and m^3/s.
In 1800 an undeveloped country had a population of 10 million with birth and death rates of 60 and 52 per thousand per year. The situation continued until 1900, when the death rate instantaneously was reduced to 10
A transit was set at point M and a leveling rod was held vertically at point N. The horizontal cross line of the telescope was inclined so the reading of the horizontal cross line on the rod was 12 ft.
the 30 ft simple beam shown has lateral support spacing at 15 ft for its compression flange and consists of 50 ksi steel. the beam supports a gravity service dead load of 1.2 klf (includes beam weight) and a gravity live load of 3.4 klf
The length of a reading room in a library is 10 m and its breadth is 8 m. Compute the distributed live load, assuming the basic value of the load to be 2873 N/m2.
An engineer is designing a hydraulic lift with a capacity of 10 tons. the moving parts of this lift weigh 1000lbf. the lift should raise the load to a height of 6ft in 20 seconds. This will be accomplished with a hydraulic pump
Show that the model and prototype Reynolds numbers are not equal, but sufficiently large for approximate dynamic similitude. For the length scale in the Reynolds number, does it make a dierence if you choose building height or building width? Which d..
draw shear and bending moment diagrams determine the maximum stress on the beam (E=2.0E+11Pa) a simply supported beam AB is 5 m long carrying a uniform distributed load of 10kn/m over a 4m span
A minimum contact time of 30 min is required to reduce the pathogen concentration from 100 pathogens/L to below 1 pathogen/L through a first-order decay process. You plan on treating water at a rate of 1,000 gal/min.
A ten-foot high wall will retain a medium dense sand backfill. Determine the Rankine earth pressure diagram and the total active force on the wall.
A sample of undisturbed soil has a dry weight of 10 lb and volumen of 1 ft^3. If the specific gravity of the soil solids is 2.65, determine the void ratio and the porosity.
A crop has a consumptive use requirement of 1.2 acre-ft of water per acre of crop land. The crop is planted on 780 acres. Precipitation is 3.2 inches. The remainder of the 1.2 ac-ft/ac requirement is met by irrigation.
To avoid the salinization of soil in a farming area, parallel drainage canals are to be installed to maintain the water table at a depth of at least 4m below the ground surface. It is thought that no evapo-transpiration would occur below that depth. ..
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