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1.A small town produces 0.15 MGD of wastewater. how many acres in size would an aerated lagoon need to be to treat this wastewater assuming a depth of 8 ft and a detention time of 6 days ? (7.48gal/ft^3 ; 43,560 ft^2/acre)
2.What is a trajectory diagram? What is the use of a trajectory diagram in traffic flow analysis? Describe.
3.It was observed that the quantity of the water flowing through the sand layer into the collection ditch is 250 m^3/day. What is the hydraulic conductivity of the sand (k)
4.A Carnot heat engine is supplied with a high temperature heat source at a rate of 200 kW. If the power output of the heat engine is 120 kW, determine the required source temperature if the heat sink temperature is 20 °C.
A municipal WWTP discharges 22.5 MGD of secondary effluent containing 45 mg/L of ultimate BOD at 26.7 oC with 1.3 mg/L of dissolved oxygen. The stream flow is 237 ft3/s at a velocity of 2.1 ft/s and an average depth of 7 ft.
The cable stays AB and AD help support pole AC. Knowing that the tension is 120 lb in AB and 40 lb in AD, determine graphically the magnitude and direction of the resultant of the forces exerted by the stays at A using (a) the parallelogram law, (b) ..
The 1-hr UH in the table was recorded for a particular watershed. Determine the size of the watershed in acres and then convert the 1-hr UH into a 3-hr UH for the watershed.
When the gear rotates 18 revolutions, it achieves an angular velocity of omega= 40 rad/s , starting from rest. Determine its constant angular acceleration the time required.
An 8-inch water main with a flow rate of 14 ft3/sec raises 100-feet. At the beginning of the main the pressure is 110 psig and drops to 50-psig at the end. For this water main calculate the head loss
The heat resisting alloy S-590 is used for a component that will be exposed to 700°C. With a safety factor of two on the time, determine the maximum static stress the component must sustain in order to have a service life of 10000 hours.
1. In which circumstance are multiple copies of the same unicast frame likely to be transmitted in a switched LAN. 2.If you want to disable STP on a port connected to a server, which command would you use
two identical spheres of radius 8 in and weighing 2 lb on the surface of the earth are placed in contact. find the gravitational attraction between them.
Select the beam dimensions and reinforcement for a balanced section if the beam sustains a moment as a result of dead load of 60 kip-ft and a moment as a result of live load of 90 kip-ft
A body slides down a frictionless plane and during the third second after starting from rest if it travels 20.4m. What is the angle of inclination of the plane?
If the bag is released with the same upward velocity of 6m/s when t=0 and hits the ground when t-8 seconds, determine the speed of the bag as it hit the ground and altitude of the balloon at this instant (t=8s).
Installing an automated production system costing $278,000 is initially expected to save Zia corporation $52,000 in expenses annually. If the system needs $5000 in operating and maintenanc
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