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Water at 20 C flows in a conduit with a cross-section shaped in the form of an equilateral triangle. The cross-sectional area of the conduit is 100 sqaure meters and e=0.045 mm. If the friction head loss is 1 m in 50 m, find the approximate flow rate.
A motorists inflates the tires of her car to a gauge pressure of 180 kilopascals on a day when the temperature is -8.0 degrees Celsius. When she arrives at her destination, the tire gauge pressure has increased to 245 kilopascals.
The flow rate of the treatment plant is 2,000 m3/d. a. Calculate the mass of sodium bicarbonate (NaHCO3) that would be required per day to replace the alkalinity consumed.
design a horizontal curve for a two-lane road. The road has 12-ft. lanes. Due to expansive excavation, it is determined that a maximum of 34 ft. can be cleared from the road's centerline toward the inside lane to provide for stopping sight distanc..
Estimate the median and 90th percentile load of SS contained in the runoff. Note: COV = coefficient of variance
A complete mix activated sludge plant operates at design Q, with the reactor tank volume set by a nominal= 6 hours.. a) It was anticipated that it would operate at 25% RAS for an expected Xr= 2,000 mg/l. What would the actual be
A 1.0 × 106 gallon reactor is used in a sewage-treatment plant. The influent biochemical oxygen demand (BOD) concentration is 100 mg/L, the effluent BOD concentration is 25 mg/L, and the flow rate through the reactor is 500 gal/min.
A $325,000 bond has an interest rate of 8.4% but if the bond experiences an inflation rate of 8.6% what will be the profit be after 4 years
A rigid 1ft^3 vessel contains R-134a originally at -20F and 27.7% quality. The refrigerant is then heated until its temperature is 100F. Calculate the heat transfer required to do this, in Btu.
At a local engineering firm, a supervisor thinks about buying a new copy machine for $700 but only wants to keep it for 3 years. Using the DDB find the book value of the machine at the end of 2 years.
A cylindrical metal specimen 12.0 mm in diameter and 120 mm long is to be subjected to a tensile stress of 40 MPa . at this stress level the resulting deformation is totally elastic.
Given simply supported beam with an overhang. The beam is 12 inches wide by 24 inches deep, and the slab is 6 inches deep. use a roof live load of 20 psf, and a concrete density of 150 pdf. the beams are spaced 15 feet apart.
The slabs are to be built integrally with the end supports, which are spandrel beams. fy = 60,000 psi, fc' = 4000psi normal-weight concrete. Clear spans are 15 feet, 18 feet and 15 feet. with the longitudal span of 38 feet.
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