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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 death rate in seawater is 0.3 1/h. The current carries the wastewater plume toward the beach at a rate of 0.5 m/s. The ocean current may be approximated as a pipe carrying 600m3/s of seawater. Determine the coliform concentration at the beach. Assume that the current behaves as a plug flow reactor and that the wastewater is completely mixed in the current at the discharge point.
When the ambient air is at 70 degrees Fahreneit, 14.7 psia, and contains 21% oxygen by volume, 4.5 lb of air are pumped into a scuba tank, capacity 0.75 ft^3. What volume of ambient air was compressed?
determine the velocity and acceleration of point C of the belt, (a) immediately before the power is turned off. (b) 9 s later.
A fisherperson, pulling on the anchor cord, causes a force on the man of F=(40i+20j-50k)N. If the cord is 30m long,determine the Cartesian coordinates of the anchor at A. Assume that cord OA is a straight line.
A 1 m3 sample of air was found to contain 88 mg/m3 of NO2 .The temperature and pressure were 25.0°C and 103.2 kPa when the air sample was taken. What was the NO2 concentration in parts per million
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)
A pickup truck has a width of 78.7 in. Ifit is traveling north at 39 m/s through amagnetic field with vertical component of 32 µT, what magnitude emf is induced between the driver and passenger sides of the truck
Calculate the area of a circular tract of land which has a radius of 30 meters using the mathematical formula, Trapezoidal Rule, and Simpson’s Rule. Compare your results. Use an offset of 5 meters.
how many kilograms each of pearlite and preutectoid phase form? schematically sketch and label the resulting microstructure
A gas bubble is formed at the tip of a small tube which is completely immersed in a large body of liquid. The bubble remains in contact with the open end of the tube in a way that allows us to control the pressure P inside the bubble.
Imagine two small towns of 1,000 people: Blacktop and Parktown. In the urban sprawl that is Blacktop, all the residents own fuel-efficient cars (15 km/liter) and travel an average of 20,000 km per year.
Find the dimensions of a rectangular concrete channel to carry a flow of 150 m3/s, with bottom slope 0.015, and mean velocity 10.2 m/s.
A dry quartz sand has a unit weight of 100 pcf. What is the soil's unit weight when the degree of saturation is 75% if Gs = 2.66
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