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A 9,000-lb single wheel load is placed on a PCC slab that is 9.5 in. thick. The concrete has a modulus of elasticity of 5 million psi with a Poisson's ratio of 0.15. The modulus of subgrade reaction is 225 pci. Tire pressure is 90 psi.
Calculate the maximum bending stress if the load is placed at the interior of the slab, assuming the shape of the loaded area is: (i) A circle; (ii) A square. Comment on the practical significance of the discrepancy between the two solution sets.
The initial schedule called for 500 feet of pipeline to be installed each week, with the total construction cost projected to be $25 million. After 8 weeks, 4750' of pipeline has been installed at a cost of $11.25 million.
A maximum flow rate of 6 CFS is available for a river model. This corresponds to 30,000 CFS for the prototype. What is the scale of the model in terms of the prototype size
Estimate the time when the temperature at the geometric center of a 6 cm diameter apple held in 2`C water stream reaches 3oC. The initial uniform temperature of the apple is 15`C.
A 100-ft steel tape of cross-sectional area 0.0025 in^2, weight 2.3 lb, and standardized at 68 degrees F is 99.992 ft between end marks when supported throughout under a 12-lb pull.
A 250 mm- diameter and 16 m-long timber pile is driven into a sandy soil where f= 18 kN/m3 and f' = 34 degree. Estimate the maximum load allowed on the pile with a safety factor of 2.5.
two cohernt sources produce interference patern intensity ratio of bright fringe to dark fringe is 9/1. calculate the intensity ratio of sorces.
The total dissolved inorganic carbon (TIC) of a sample of groundwater is 8.33 mM. The temperature of the aquifer is 15C, the pH is 7.5, and the ionic strength is 0.05 M. What is the H2CO3, HCO3-, CO3 2-, and the partial pressure of CO2? [Use activ..
what is the rate of evapouration of water from a reservoir with air temp at 20c and the surface of reservoir is 3000m2.
A waste mixture contains a variety of volatile organic compounds, nonvolatile organics, metals, and sandy soil. In a vitrification treatment, a. which of these materials are likely to be retained in the resulting solid
Using a safety factor of two based on the stress, determine the maximum temperature the component must be exposed to for it to sustain the stress for at least 1000 days.
A consolidated-drained triaxial test on a normally consolidated clay yielded a friction angle of 28°. If the all-round confining pressure during the test was 140 kN/m2, what was the major principal stress at failure.
calculate the gravitational force between the earth and the moon in newtons. the distance between the earth and the moon is 384x10^3
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