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45 ft wide, and 14 ft deep and treats 10 mgd. The power input to provide paddle-blade velocities of 1.0 and 1.4 fps for the inner and outer blades, respectively, is 930 ft'lb/s.
A sedimentation basin is used to remove suspended solids from a wastewater. The rate of flow of wastewater into the tank is 10 L/s, and the influent concentration of suspended solids is 200 mg/L.
During the recent camping trip, a curious junior engineering student (like yourself) noticed that water is being discharged from a high reservoir to a stream in the valley through a 0.3 m diameter p
Constructing the foundation causes changes in the levels of vertical stress at all points in the soil. One such point lies at the centre of the footing plan and is at a depth of 10m. Determine the i
Undrained Shear box tests were carried out on a series of soil specimens with the following results Total Normal Stress (kPa) Total shear stress at failure (kPa) Determine the cohesion and the angle o
The total number of effective exposures per unit of advertising medium depends on the region reached. In Louisiana, the number of effective exposures is 70,000, 100,000 and 75,000 for television, ra
A pre-sedimentation basin has been designed that reduces the river water suspended solids concentration from 500 to 200 mg/L. How many pounds of dry solids does this represent per million gallons of
A stream of water of cross-section area A and velocity v1 strikes a plate which moves to the right with a velocity V. Determine the magnitude of V, knowing that A 5 600 mm2, v1 5 30 m/s and P 5 400
In Singles badminton game, shuttle is smashed by Player A from close to base line, which is 6 m from the net. Height of the net to be cleared by a smash is 1.55 m. The shuttle is hit by player A at
Initially the air in this tank is at 20 psia and 70 degrees F. Presuming that the ank is well insulated determine the temperature and mass in the tank when it is filled to 120 psia.
Vehicles arrive at a toll bridge at a rate of 430 veh/hr (the time between arrivals is exponentially distributed) Two toll booths are open and each can process arrivals (collect tolls) at a mean rat
The potentiometric surface elevations at two observation wells 1000 m apart are 52.35 m and 56.90 m. If the horizontal hydraulic conductivity of the auquifer is 25 m/ day determine the flow rate per
Mike and Susan hope to retire a few years early, they decided to pay closer attention to the predicted amount of retirement benefits and do some analyses on the numbers.
The cylinder has a length of 120 cm and a diameter of 12 cm. The field sample with a porosity of 0.24 is tested under a constant head difference of 160 cm with water at 10 degree Celcius.
Calculate the temperature increase which would induce maximum compression in the wall of the vessel equal to the maximum tension. young's modulus for steel can be taken as 200Gpa and the coefficient
The rate of water level change was measured when the water in the auger hole was 5 meters below the water table, and was determined to be 5 cm/s. Determine the hydraulic conductivity of the aquifer
Determine the forces that occur on the L5/S1 joint if a person has a bent posture with hips flexed at 65 Degrees with no load. The distance from Upper Body Center of Gravity to L5/S1=30cm.
1. What is meant by the "base value" in an arithmetic gradient 2. Which two alternative comparison techniques requier equal service lives Why
A one-way solid concrete slab is to be used for a simple span of 16 ft. In addition to its own weight, the slab carries a superimposed dead load of 50 psf and a live load of 75 psf.
A galvanized iron pipe with a roughness height (e) of 5x10-6 m with a diameter (D) of 0.05 m and a length (L) of 100 m carries a discharge (Q) of 0.003 m3/s. Calculate the head loss (hL).
Determine the thickness of the viscous sublayer in a smooth 20 cm diameter pipe, if the Reynolds number is 25000.
Develop algorithms for the explicit solution of the Kinematic Equations when applied to a problem of runoff from a plane surface subject to a steady rate of rainfall excess.
What would be the absolute pressure, P in kPa, of carbon dioxiode at 20 degrees celcious if the specific weight of carbon dioxide at 20 degrees celcious is 18 N/m^3 and the gas constant, R =1.889x10
The maximum specific growth rate of the organisms driving this reaction is 5.0 days -1 and the growth rate is 0.54 day-1. The activated sludge tank has a volume of 40 m3 and the flow rate into it is
The concentration of Chemical Oxygen Demand (COD) in the effluent from this system is 25 mg L-1. The growth rate of the organisms in this case is 0.9 days-1. The activated sludge tank has a volume o