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If an analysis is made of the hydraulic conductivity of a site using permeameter tests of core samples, slug tests of monitoring wells, and pumping tests of production wells, it is often observed that the hydraulic conductivity as measured by each method is different. Which method would be most likely to have the greatest hydraulic conductivity, and which the least. What are some possible reasons why this would be true?
Calculate the net present value of each option based on a discount rate of 5%/year. (Hint: draw a cash flow diagram for each of the two options.)
Determine the maximum and minimum stress intensities in the section.
A Silane contains 90.31 % silicon and 9.69 % hydrogen by mass. The compound has a molar mass of 62 g/mol. Determine the compound's empirical and molecular formula.
1. What is meant by the "base value" in an arithmetic gradient 2. Which two alternative comparison techniques requier equal service lives Why
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 two post in ground car lift uses compressed air to force water under two aluminum pistons that move in unison (both pistons at same elevation) to raise and lower the vehicles.
If the load effect has a mean value of 88 kips and a standard deviation of 1.8 kips. If the nominal material strength is 160 kips Determine the followings 1- The probability of failure of the structure under the nominal resistance and service load..
a direct shear test is performed on a saturated specimen of loose sand. a normal nbspstress equal to 100 kpa is applied
fator dumps 5m^3/s of nonconservative waste with concentration 100mg/l into the lake. the pollutant has a reation rate coefficient K of 0,23/day assuming the pollutant is well mixed in the lake, find steady state concentration of pollatant in the ..
A simply supported beam with a pin support at A and a roller support at B with length L=20 ft has a force P=10 kips applied at x=15 ft from point A. What are the reactions at A?
Determine the centroid for the region bounded by the x-axis, the curve y=x^3, and the line x=3
A 0.02wt% C steel is to be carburized at 1200°C in 4 hrs with a point 0.6mm beneath the surface reaching 0.45wt%C. calculate the carbon content required at the surface of the steel.
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