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A Single clean layer of sand in a rapid-sand filter has an average grains size of 20X40 US. Mesh, porosity go 0.4, sand specific gravity of 2.65, and shape factor of 0.85. The absolute viscosity and density of water are 1.4X10^-3 Pa-s and 998 kg/m^3, respectively. For a head loss of 0.1 m, determine the filtration rate (m/d) if the depth of this layer of sane is 0.1m?
The characteristics of the line are 5,000 ft of steel pipe (e = 0.00015 ft) which has an ellipsoidal cross section (flow area = 4 ft^2; wetted perimeter = 8 ft); three standard elbows (K = 0.9 per elbow); a globe valve (K = 10); and a re-entrant p..
Consider the following two simultaneous equations: x^2 + y^2 = 42x + 3*y + 2*y^2= 6 Which of the following is a possible solution for x and y? Answer x = -6.22 & y = 1.83 x = 6.48 & y = 0.18 x = -5.59 & y -1.38 x = 6.33 & y = -3.27
A 2000-lb wheel load is to be supported by aggregate over soil with a maximum bearing pressure of 1000 lb/sqft. What depth of aggregate is needed if the angle theta is 40 degrees?
During an engine test on the ground, a propeller thrust T = 4000 N is generated on the 1500 kg airplane with mass center at G. The main wheels at B are locked and do not skid; the small tail wheel at A has no brake.
A 40-cm straight pipe is used to carry water at 20 degrees C from resevoir A to resevoir B that is 0.7 km away. There is an elevation difference of 9-m between the two resevoirs. Determine the discharge for
Along the length of the channel the bed drops by an average of 2.5 metres every kilometre. Historic accounts indicate that the maximum flow of water in the channel prior to the construction of the gauging structure was 1.4 m.
Calculate the approximate alkalinity (in mg/L as CaCO3) of a water containing 120 mg/L of bicarbonate ion and 15 mg/L of carbonate ion.
Write a computer program that generates a sequence of random variables from a normal distribution with mean 5 and standard deviation 2. a) Verify that sample mean and the sample variance converge to the respective population values.
A small city is evaluating disinfection requirements for their drinking water plant. With an average flow of 5 MGD and a peak flow of 9 MGD, determine the controlling CT factor (virus or giardia) when the water temperature is 23 degrees C.
The magnetic declination at a certain place is 12 degree 6 minutes W.What is the magnetic bearing there (a) of true north (b) of true south and (c) of true west?
Aerotron Electronics is considering purchasing a water filtration system to assist in circuit board manufacturing. The system costs $40,000. It has an expected life of 7 years at which time its salvage value will be $7,500.
A water treatment plant effluent is to be disinfected with chlorine from ton cylinders of compressed gas. The plant is 5 million gallons per day. There are a total of 10 useable cylinders in the plant.
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