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A small lake with volume 20.0 x 103 m3) has no natural pollutant sources. However, a sewage pipe discharges sewage containing a pollutant into the lake. Conditions in the sewage pipe ate Qs = 0.5 m3/s, and Cs = 100.0 mg/L The pollutant is destroyed in the lake with a first-order rate constant of 0.2Wday. The flow rate out of the lake is 5.0 m3/s. Assume that the lake is well-mixed.
(a) Calculate the steady-state pollutant concentration in the lake.
(b) What is the retention time for this lake?
An inverting amplifier is implemented with a R1=10 kilo Ohms and R2= 100 Kilo Ohms, and an op amp with finite open-loop gain a=10^3 V/V. Sketch and Label Vi,Vo,and Vn versus time if Vi is a 1-kHz triangular wave
What are the two conditions of the process that are required for an isentropic process defined in (a) to take place ? Prove your answers with second law equation for a control volume.
The assignment is to create a comprehensive cost estimate based on the generic plans for the warehouse. Include all work associated with Construction Specifications Institute (CSI) MasterFormat 2004 Specifications Divisions 1 through 6 and 31 thr..
What is the history of Algebra? Where it began? When it began? Who discovers? Who are the related people in the history of Algebra and what they contribute? Further explain,
Calculate how many chlorine atoms will be in an average neoprene chain? b) Sketch the bonding between polychloroprene chains due to sulfur linkages as neoprene is vulcanized into an elastomer. c) You decide to go swimming in Bear Lake in late Novembe..
The transition at the cross sections of the step in ductile shaft has a radius of 3 mm. Yield strength is 80 MPa, ultimate strength is 150 MPa. Determine maximum in plane shear stress in the shaft.
If water at 70 degrees C (row=1.94 slugs/ft^3, vapor pressue= 0.363psia) is used in a simple barometer what is the height of the column of water if the atmospheric pressure is 15 psia
After the copper mass is added, the final temperature of the mixture is 38 degrees Celsius. By checking the mass, it is determined that 1.2 grams of water evaporated. What was the temperature T
Calculate the required compressive strength for a concrete mix design if F'c = 5000 psi and data indicate a standard deviation of 600 psi based on 15 tests for a similar concrete mix
use the conjugate beam method and determine the slope and displacement at the end C of the beam. E=200 GPa, I=70(10^6)MM^4
A satellite would have a mass of 200 kg on the surface of the moon. Determine the weight of the satellite in pounds when it is in orbit 10,000 mi. above the surface of the earth.
the most famous geyser in the world old faithful in yellowstone national park has a mean time between eruptions of 85
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