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The two-pond system shown below is fed by a stream with a flow rate of 1.0 MGD and a non-conservative pollutant concentration of 20.0 mg/L. The rate of biological consumption is 0.3 day-1. Find the pollutant concentration leaving each pond if the volume of the first is 5.0 million gallons and the volume of the second is 3.0 million gallons.
Determine the thickness of the viscous sublayer in a smooth 20 cm diameter pipe, if the Reynolds number is 25000.
The influent BOD5to a primary settling tank is 345 mg/L.The average flow rate is 0.050 m3/s.If the BOD5 removal efficiency is 30%,How many kg of BOD5 are removed in the primary settling tank each day?
What will the freeway's density and level of service be before and after the ban? (Assume that the trucks are removed and all other traffic attributes are unchanged)
The wood specimen is to be loaded in a testing machine until it fails in tension. The ultimate normal strength of the wood is ?ult = 1800 psi and the ultimate shear strength of the wood is ult = 800 psi.
You are a real estate salesperson working for Good Earth, Realtors, Inc. You receive 50 percent of all commissions received by the firm (net of MLS fees) for which you were either the listing agent or the selling agent.
You find a spool of pure copper wire while snooping through your brother's purse. The wire has a diameter of 0.3 millimeter and a length of 200 meters. A) Derive a formula for the resistance of the spool as a function of temperature.
Provided that the amplitude is sufficiently great, the human ear can respond to longitudinal waves over a range of frequencies from about 20 Hz to about 20000Hz. Compute the wavelength corresponding to these frequencies
A 5-m wide rectangular open channel lined with rubble masonry (n=0.025) and laid on a slope of 0.0004. If the depth of flow is 3 m, what is the rate of discharge (m3/s)
It the mean annual runoff of a drainage basin of 10000 km^2 is 140 m^3/s, and the average annual precipitation is 105 cm, estimate the ET losses for the area in 1 year. What are your assumptions
Use the Muskingum method to route a flood through a reach a river. The base flow is 100 cfs, and the incoming flood flow increases 50 cfs every 2 hr over a 6 hr period and the subsides at the same rate.
The following data were recorded from a liquid limit test on a clay using the Casagrande cup device.
A simple beam has a 24 foot span and a W16 X 50 section. Determine the maximum flexural stress due to two concentrated loads, both 20 kips, at the 1/3 point and the 2/3 point (8 feet and 16 feet) on the beam.
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