Engineering, 12.11.2019 23:31 eddyreynoso5025
2) poorly treated municipal wastewater is discharged to a stream. the river flow rate upstream of the discharge point is qu/s = 8.7 m3/s. the discharge occurs at a flow of qd = 0.9 m3/s and has a bod concentration of 50.0 mg/l. assuming that the upstream bod concentration is negligible. (a) what is the bod concentration just downstream of the discharge point? (b) if the stream has a cross-sectional area of 10 m2, what would the bod concentration be 50 km downstream? (bod is removed with a first¬-order decay rate constant equal to 0.20/day.)
Answers: 3
Engineering, 03.07.2019 15:10
If you were designing a bumper for a car, would you prefer it to exhibit elastic or plastic deformation? why? consider the functions of a bumper in both a minor "fender-bender" and a major collision.
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Engineering, 03.07.2019 15:10
Heat is added to a piston-cylinder device filled with 2 kg of air to raise its temperature 400 c from an initial temperature of t1 27 cand pressure of pi 1 mpa. the process is isobaric process. find a)-the final pressure p2 b)-the heat transfer to the air.
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Engineering, 04.07.2019 18:10
Water at 70°f and streams enter the mixing chamber at the same mass flow rate, determine the temperature and the quality of the exiting stream. 0 psia is heated in a chamber by mixing it with saturated water vapor at 20 psia. if both streams enters the mixing chamber at the same mass flow rate, determine the temperature and the quality of the existing system.
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Engineering, 04.07.2019 18:10
Slip occurs via two partial dislocations because of (a) the shorter path of the partial dislocation lines; (b) the lower energy state through partial dislocations; (c) the charge balance.
Answers: 1
2) poorly treated municipal wastewater is discharged to a stream. the river flow rate upstream of th...
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