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Soil is excavated from a borrow to construct an embankment with a net volume of 50,000 cy with 95% of Modified Proctor maximum dry density of 110 pcf with a Modified Proctor optimum water content of 8%. Dry density of soil in borrow 114 pcf. Soil specific gravity 2.35. Water content in borrow 16.5%. What would be the minimum number of truckloads required to transport the soil from the borrow? Each truck holds 8.2 cy of soil with void ratio of 1.12.
A bicyclist travels on a level path. The frontal area of tje cyclist and the bicycle is 2 ft^2 and the drag coefficient is .8. The specific weight of aire is .075 lb/ft^3
A 1-m diameter cylindrical mass, M, is connected to a 2-m widerectangular gate. The gate is to open when the water level,h, drops below 2.5 m. Determine the required value forM. Negate friction at the gate hinge and the pulley.
A 110 cm^3 sample of wet soil has a mass of 106 g and a degree saturation of 100%. When oven-dried, the mass is 81 g. Determine the 1) water content, 2) specific gravity, 3) void ratio, and unit dry weight of soil particles.
Determine the reduction of capillary rise if the contact angle representing the adhesion between water and soilmaterial is increased from 30 degrees to 60degrees.
A canal cut in rock (n= 0.030 is trapezoidal in section with the bottom width of 6.10m and side slopes of 1 on 1. The allowable average velocity is 0.76 m/s. What slope will produce 5.66 m^3/s
Compute the motor size required to pump 28.3 cms through a 3,050 m long, 3.66 m diameter pipeline to an upper reservoir 610 m above the lower reservoir. Use a friction facter of 0.02 and a pump efficiency of 80 percent.
An infinite, long, solid, vertical cylinder of radius R is located in infinite mass of compressible liquid. Provide the velocity distribution for steady flow case
A long wide rectangular channel carries a steady flow rate of 35 m2s-1 (flow per unit width) and passes through an abrupt change in slope from 0.005 (upstream of the change) to 0.003 (downstream).
One accident mitigation procedure is called emergency material transfer, in which the material is transported away from the accident site before it becomes involved. We plan on mitigating a crude oil tank fire scenario by pumping the tank empty in..
A heat pump operates between 250K and 300K. The cooling rate is 3.6 kW while the work input rate is 1.2 kW. The COP for the heating achieved is? Provide full details of work to receive good rating.
25 mg chemical Y (log kow = 2.88) is added to a microcosm (i.e., tank) that contains 1 kg soil, 20 L water. Chemical Y has negligible volatility (very low partitioning to air). The soil is mized with water for several days until equilibrium (between ..
A steady flow of refrigerant 134a enters a throttling valve in a refrigeration unit as a satrurated liquid with a pressure of 150 psia. The refrigerant is discharged with a pressure of 40 psia.
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