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Particles setting in grit chamber in a typical wastewater treatment plant is a type I sedimentation, i.e., particles settle as discrete particles and no flocculation happens during sedimentation. Assuming that a spherical particle is exerted with only three forces: gravitational force FG= rs g Vp, buoyancy force FB= r g Vp, and drag force FD= CDApr v2/2. Solve for the constant terminal settling velocity (Vs) when total drag forces equal the driving force. Please show the detailed steps to get full credit.
You are in charge of evaluating the safety (hazard) of a low water crossing. Traffic surveys show that the "Aaverage"vehicle using the crossing is semi-rectangular in shape (10 ft long, 5 ft wide, and 4.0 ft high - not including the distance from the..
An ethanol plant distills alcohol from corn. The distiller processes 2.0 t/h of feed containing 15% alcohol and 82% water; the rest is inert material. The bottoms (waste) produced is 85% of feed and contains 94% water, 3.5% alcohol, and 2.5% inert..
There are many parallels between the industrialization of the United States after Reconstruction and the modernization of the American workforce in the last twenty to thirty (20-30) years as it transitions from industry to a service-oriented econo..
The level of one reservoir is 500 ft above the level of the other, and water is flowing steadily through the pipe from one reservoir to the other.
a vertical curve with grade1= 3.6% meets the exit grade of -4.7% at PVI located at station 26.50. A vertical curve of 700 feet is propsed to provide the transition between the two grades.
A disk spins within an oil-filled enclosure, having 2.4 mm clearance from flat surfaces each side of the disk. The disk surface extends from radius 12 to 86 mm. What torque is required to drive the disk at 660 rpm if the oil's absolute viscosity is ...
The void ratio of soil in the borrow pit is 1.12. Estimate the volume of soil (cubic meters) that must be excavated from the borrow pit.
A single screw extruder is being used to process pregelatinized starch. The screw dimensions are as follows: channel width 3 cm, channel height 0.5 cm and screw length 50 cm. The wall velocity is estimated to be 0.31 m/s.
Water flows into and out of a 5 liter tank at a rate of 1 L/min. Within the tank, the mineral apatite is dissolving at a rate of 3x10^-10 moles of Si per m^2 per sec. If the tank contains 10g of the apatite with a specific surface area of 2 m^2/g,
Also discuss the experimental procedures you would use for the calibration of crack length and crack closure, where appropriate, for each of the above methods.
Determine the horizontal spacing of the vertical drains if the drains are installed in triangular grid to reach 90% of primary consolidation in 1.5 years after the commencement of fill placement.
Explain how geological processes have shaped and fashioned the Earth, producing its rocks and minerals and evaluate the importance of maps and mapping techniques in interpreting geological structures.
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