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1.Water at 50 degrees Celsius flows in a 150-mm-diameter pipe with V=6.5 m/s and e=0.14 mm. Head loss measurements indicate that f=0.020. What is the thickness of the viscous sublayer? Is the pipe behaving as a fully rough pipe?
2.In a 1.00-m-diameter pipe velocities are measured as 5.35 m/s on the centerline and 4.91 m/s at r=70 mm. Approximately what is the flow rate?
3.Two pipes, one circular and one square, have the same cross-sectional area. Which has the larger hydraulic radius, and by what percentage?
4.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?
Determine the clean filter head loss in a filter bed composed of 0.3 m of uniform anthracite (with an average size of 1.6 mm) placed over 0.3 m of uniform sand ( with an average size of 0.5 mm) for a filtration rate of 160 L/m^2.min.
A lagoon with volume 1,200 m3 has been receiving a steady flow of a conservative waste at a rate of 100 m3/day for a long enough time to assume that steady-state conditions apply. The waste entering the lagoon has a concentration of 10 mg/L.
A strata of clean, light-colored quartz sand located below the groundwater table has a moisture content of 25.6%. The minimum and maximum void ratios of this soil are 0.380 and 1.109, respectively
The average unit weight of this soil is 118 lb/ft^3, and the average moisture content is 9.6%. It also has a maximum dry unit weight of 122 lb/ft^3 and an optimum moisture content of 11.1%
Knowing that the tension in the spring is70 N and the speed of the collar is 3.8 m/s as it passes through point A, determine, at that instant, the radial and transverse components of acceleration of the collar.
Compute and compare the hydraulic conductivity (m/s) of a formation with respect to the three liquids below. The formation has a permeability k = 0.1 darcy and g = 9.8 m/s2. Liquid viscosity (g/cm s) density (g/cm3)
Given that the average power plant produces 667 MW of electricity per year, there are 492 coal plants in the US, and a solar constant of 1.361 KW/m^2, how large of an area would one need to cover with solar cells to replace our dependence on coal ..
The arrival rate at a parking lot is 6 veh/ min. Vehicles start arriving at 6: 00 P. M., and when the queue reaches 36 vehicles, service begins. If company policy is that total vehicle delay should be equal to 500 veh-min, what is the departure ra..
Due to the intended service use, the forklift's market value drops 20% of its prior year's value in Years 1 and 2 and then declines by 15% until Year 10 when it will have a scrap/market value of $1000.
You are to assume that seawater at 77oF will be used in the tank and the curved portion forms a quarter of a circle. The tank is open to the atmosphere. The overall height, h2, is 20ft deep. The radius of the curve, R, is 5ft. The width of the..
A 1,000 L water tank contains 1,200 moles of an experimental chemical that is a weak acid with pka of 7.2. The PH of the tank is 9.0. what is molar concentration of the chemical that will dissolve in the water at PH 9.0
the j-shaped member shown in the figure is supported by a cable de and a single journal bearing with a square shaft at
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