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1. 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.
(a) 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.
2.Solid waste production in the United states was 4.3lbs/person-day. Calculate the potential methane production in one year for a land fill that serves a community of 50,000 people. Assume that none of the solid waste is recycled, that all the solid waste can decompose rapidly, and that the density of methane equals 0.717kg/m cubed
establish a grass cover over a 10ha landfill. the root zone of the grass is 40cm deep. increase the volumetric water
Compute the required layout distance if the Temperature is 13 degrees celcius, Tape Length is 29.990 m, and the required Layout distance is 500.000 m.
The wall footing is used to support the column load of 12,000 lb. Determine the intensities w1 and w2 of the distributed loading acting on the base of the footing for equilibrium
The soil undergoes shear failure and reaches critical state on this plane when the pore-water pressure is increased to 120 kPa while keeping the total normal and shear stresses constant.
A steel pipe carries an industrial oil under pressure. The steel pipe inside diameter is 36 in, the pressure head on the fluid is 383.0 ft. A)- Find the internal fluid pressure in psi
he concentration of carbon in an iron-carbon alloy is 0.15 wt%. What is the concentration in kilograms of carbon per cubic meter of alloy
The local engineer concludes that, since the oil must have been destroyed by the soil microorganisms at a rate of 20 mg/kg each year, in one more year the site will be free of all contamination. a. Is this a good assumption
A company issues corporate bonds that have a coupon rate of 4%, pays dividends quarterly, and has a term of 10 years. Compute the dividend paid per quarter for each bond.
The maximum vertical load and horizontal load have been identified and shown in the figure. Under this loading condition, you are asked to determine the horizontal deflection of joint C.
calculate the amplitude F0 of the sinusoidal excitation force that is necessary to produce a steady-state vibration with a velocity amplitude of 10 m/s at resonance
The flywheel of a prototype car engine is under test. The angular position of the flywheel is given by x = (3.0rad/s3)t3 and the diameter of the flywheel is 36cm.
A water tank has a height of 120m, and its area of cross-section is 2000m. Water is released from the tank and the water level drops by 1 meter every minute. Find the rate of change in volume.
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