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The wet mass of a sample of saturated soil is 520 grams. The dry mass, after oven-drying, is 400 grams. Determine the a) water content b)void ration c)saturated unit weight, and d)effective unit weight
On a flexible pavement with a 3 inch hot mix asphalt (HMA) wearing surface, a 6 inch soil cement base and an 8 inch crushed stone subbase, which truck will cause more pavement damage?(Suppose drainage coefficients are 1.0).
Determine the maximum force (P) that can safely applied to a steel tee section (20 feet in length) with the point loads at 5 feet from each end. Fixed at one end, pin at the other.
During a test flight in which a 9000-kg helicopter starts from rest at t = 0, the acceleration of its center of mass from t =0 to t =10 s is a=(0.6t)i+ (1.8 0.36t)j m/s2.
Assume that there were 1,100,000 vehicles making a 28.5-mi round trip per day, the average vehicle emission rate for VOCs is 1.3 g/VM , and the molecular weight of the VOC emissions from the mobile sources can still be represented by that of metha..
How many trips would one rubber-tired Herrywampus have to make to backfill a space with a geometrical volume of 5400 cubic yard. The maximum capacity of the machine is 30 cubic yard (heaped), or 40 tons.
Estimate the inside diameter, wall thicknes and outside diameter of the pipe. The carbon steel pipe has tensile yield strength of 250 MPa. Assume safety factore of 2 and a corrosion allowance of 2mm. The maximumoperating pressure (MOP) is 55 bar.
Using the phi index calculated in part c, determine the volume of direct surface runoff (acre-ft) that would result from the following: hour: 1,2,3,4 ; intensity (in/hr): 0.40,0.05,0.30,0.20. phi index found to be 0.038 in/hr
A flow of 125,000 gallons per day enters a sedimentation basin which is 20 feet wide, 60 feet long and 12 feet deep. What is the minimum settling velocity of a particles that will be 100% removed by the basin
Calculate the compressive stress (in psi) for a 6-in diameter by 12-in high concrete test specimen if the total deformation under load is 0.015 in. Calculate the total load on the test cylinder stress.
When a particle falls through the air, its initial acceleration a=g diminishes until it is zero, and thereafter it falls at a constant or terminal velocity v_f . If this variation of the acceleration can be expressed as a=(g/v^2_f)(v^2_f-v^2)
The coal-fired boilder supplies 70 MW to the steam while thermal energy is rejected to a nearby lake whos average temperature is 15 C. What is the minimum required temperture of the boiler to meet the power demands of the city
A 3-mm thick panel (1 m x 1 m) of aluminum alloy (k = 177 W/m. K, Cp = 875 J/kg. K, and p(rho)= 2770 kg/m3) is heated in a large oven with air at T = 175oC and a convective heat transfer coefficient of h = 40 W/m2.K.
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