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A single source of BOD causes an oxygen sag curve with a minimum downstream DO equal to 6.0 mg/L. If the BOD of the waste is doubled (without increasing the waste flow rate), what would be the new minimum downstream DO? In both cases assume that the initial oxygen deficit just below the source is zero and the saturated value of DO is 10 mg/L. (Note that when the initial deficit is zero, the deficit at any point is proportional to the initial BOD)
Use input values of epsilon (B1), pipe radius (B2), and Reynolds number (B3) to estimate "f" and place these in the same cells . Display the final answer in a message box and round to five figures. Use a short cut key of Ctrl+g
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.
Use modern software tools to analyze a structural system of a building.
The Caterpillar D6R Series 3 and D8R tractors are rated, respectively, at flywheel horsepowers (fwhp) 0f 185 and 305. The "A," "S," and "SU" blade widths (length) for the D6R are S, 16 ft, 9 in.; A, 17 ft, 1 in
Water under a gage pressure of 350kPa flows with a velocity of 5 m/s through a right-angled bend that has a uniform diameter of 250 mm
A certain gas has a molecular mass of 40. It is under a pressure of 2.5atm and a temperatature of 25 Degree Celsius. Determine its density and pressure in CGS absolute units.
Indoor Air quality is greatly affected by Radon, which can cause lung cancer. When we moved to Colorado, we tested the house for Radon and installed a radon mitigation system.
To determine the distance between P and B, a point Q is marked on the ground and the following measurements are made: The distance between PQ is 230.0 ft, the angle QPB is 53°30', and the angle PQB is 80°15'.
A concrete mix with a 3 inch slump, w/c (water content) ratio of 0.50, and sand with a fineness modulus of 2.4 contrains 1700 lb/cubic yard of coarse aggregate. Compute the required weight of the coarse
following results were obtained from direct shear tests on specimens of a sand compacted to the in-situ
what is a dummy activity and slack activity and also what are slack variables in linear programming constraints equation
Water at 120 0C with a quality of 25 % has itstemperature raised 20 0C in a constant volumeprocess. What is the new quality and pressure? Draw P-vand T-s diagrams
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