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The total flow at a wastewater-treatment plant is 600 m3 day-1. Two bio-logical aeration basins are used to remove BOD from the wastewater and are operated in parallel. They each have a volume of 25,000 L What is the aeration period of each tank in hours?
The moment applied causes twisting of the solid circular rod and bends the simply supported beam. Determine the rotation where the moment T is applied. Take the beam to have height h, width b, and Young's modulus E. Take the rod to have radius R a..
The elevation of the lowest bottom of the structure is at 1470 feet. Calculate the maximum length (feet) of the parabolic curve required to meet the given conditions.
Compare the strain energy developed in each case, and then explain which design is better for resisting an axial shock or impact load.
An ocean outfall diffuser that discharges treated wastewater into the Pacific Ocean is 500m from a public beach. The wastewater contains 105 coliform bacteria per milliliter. The wastewater discharge flow rate is 0.3 m3/s. The coliform first order de..
A wagon of mass 50 tonnes starts from rest and travels 30meters down a 1% grade and strikes a post with bumper spring. If the rolling resistance of the track is 50n/t. Find the velocity which the wagon strikes the post
In a truss analysis of a 100% symmetrical bridge, are all of the forces on the beams of the opposite-side equal to those on one side?
A sample of natural glacial till was taken from below the groundwater table. The water content was found to be 52%. Estimate the wet density, dry density, buoyant density, porosity, and void ratio.
An ideal Sterling cycle operates between thermal energy reservoirs at 27 degrees C and 527 degrees C. The maximum cycle pressure is 2000 kPa.
the wind reaches a speed of 27.8 m/s in a storm. calculate the force acting on a 1m x 2m window facing the storm. the window is in a high-rise building. the air density p= 1.2 kg/m3.
What should TAC , TAB and the acute angle ? between TAB and the vertical to minimize the tension TAB ? Take o and W = 1,000 N. Hint: Consider various possible force triangles and decide on inspection how to minimize TAB.
Discuss why the analysis led to your selection in step 2 and whether you would change any of the criteria or weights. Perform a supplier rating analysis for the situation. Include at least ten factors and four possible locations.
Is a soil with a hydraulic conductivity of 1*10-5 cm/s and depth of 10 ft equivalent to a soil with hydraulic conductivity of 1*10-6 cm/s and depth of 5 ft? (show mathmatically)
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