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Compare the relative contributions of a treated water supply and the collection, treatment and disposal of human wastes towards the control of epidemic diseases in developing countries. If there are insufficient resources for both systems, should one be given priority over the other?
During a 1.5-hr storm, 1.3 in. of rain fell during the first hour, and 0.4 in. of rain fell during the last half hour. The average flow in the downspouts was 1.7, 3.6, and 3.4 ft3/sec for each of the half-hour periods.
What are the effects of reducing w/c on porosity, permeability, and compressive strength of hydrated cement. Porosity: capillary pore volume/total volume of hydrated cement specimen
Rod AB is bent into the shape of a circular arc and is lodged between two pegs D and E. It supports a load P at end B. Neglecting friction and the weight of the rod, determine the distance c corresponding to equilibrium when a = 43mm and R = 143mm..
A particle travels along a straight line with a constant acceleration. When s=4ft, v=3ft/s and when s=10ft, v=8ft/s. Determine the velocity as a function of position.
Water at a pressure of 13 atm, at street level, flows into a building at 3m/s through a 6 cm diameter pipe. The pipe tapers down to a 2 cm diameter by the top floor 50 m above.
using stadia and inclined sights, the stadia top and bottom readings are 8.5ft and 6.21ft respectively, and the vertical angle is read as -8degress 42'. what is the horizontal distance.
Determine, for the crest and sag vertical curves required, the stationing and elevation of the PVCs and PVTs given that the PVC of the crest curve(on westernmost level highway section) is at station 0+00 and elevation 100 ft.
What is the percent change from 10m to the surface. Use absolute pressure and assume standard atmospheric conditions. Would the answer change with a different system of units.
To determine the elevation of a point B from the elevation of a point A, which is 511.6 ft. When the transit was set up over the point A, the height of the transverse axis above that point was 4.92 ft.
Conduct a powder factor design for the following conditions: -Rock is iron ore; density is 5370 lb/cubic yards -Rock swells 60% from in situ when broken -Bench height is 45ft -Drill hole diameter is 12.25 inches
If a watershed of drainage area 100 mi^2 has abstractions of 2.5 in/hr, what runoff volume will show up in the nearby stream in addition to baseflow for a rainfall of 5-hr duration with an intensity of 4 in/hr
the 15,000 kg boxcar A is coasting freely at 1.5 m/s on the horizontal track when it encounters a tank car B having a mass of 12,000 kg and coasting at 0.75 m/s toward it. If the cars meet and couple together
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