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The L.L of a medium sensitive Swedish post-glacial clay is 56 and the PI is 28. At its natural water content, the void ratio is 1.01 while after shrinkage the minimum void ratio is 0.72. Assuming the density of dm soil solids is 2.72, calculate the shrinkage limit of the clay.
The United States Environmental Protection Agency (EPA) has published the following data for municipal solid waste generation (in millions of tons). Estimate a value of MSW generation in the year 2025.
A reinforced concrete beam d = 18 in , and n = 10. find the diamensions b and a , that will resist a bending movement of 60 kip,ft with balanced stress reinforcement if fc =1600 psi and fs = 20 ksi
A rectangular channel of 2 m depth and 5 m width carries 1 m deep running water. It is laid to a slope of 0.001 with Manning’s n = 0.02. Some distance downstream there is a hump of height 0.5 m on the stream bed
A fellow I know wanted to know the coefficient of friction between steel and commercial carpet. The value was not in the tables of any textbook he had, so he devised an experiment.
Can you remove the adsorbed water by oven-drying at 1058C? Explain.
Describe in outline the main markets, activities and services provided by the construction and built environment sector.
A step-type escalator as shown is designed to transport 120 persons per minute at a constant speed v=1.5 ft/s. The overall efficiency of the escalator is estimated to be 70%, and a 200% overload is to be allowed. Assuming that the average weight per ..
During a 108 minute long storm, the precipitation rate over a 100 acre area is 1.65 in/hr. The phi index is 0.42 in/hr. The average outflow from the area is 92 cfs during the storm. What is the value of combined detention and interception storages ..
In order to comply with regulations, an iron/steel sinter plant installs an electrostatic precipitator (ESP) to collect 98% of the 10 ?m particles from an air stream flowing at 2 m3/s
The half life of Uranium-238 is 4.47 billion years. What is the reaction rate coefficient assuming first order decay
A complete mix activated sludge plant operates at design Q, with the reactor tank volume set by a nominal= 6 hours.. a) It was anticipated that it would operate at 25% RAS for an expected Xr= 2,000 mg/l. What would the actual be
He values the use of the pesticides at $10,000 and the neighborhood values clean air at $15,000. What does the Coase theorem suggest will take place?
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