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If the HCO3- alkalinity of a sample was 50 mg/l as CaC03, what would its alkalinity be in terms of NaCl equivalents?
A 3000 lb vehicle has a drag coefficient of 0.32 and a frontal area of 30 ft2. What is the minimum tractive effort required for this vehicle to maintain a 65 mph speed on a 2% upgrade through an air density of 0.002045 slugs/ft3
The exterior and interior walls are of concrete block. The roof is constructed of bar joists covered with a steel roof deck, rigid insulation, and built-up roofing.
Design a cyclone that has a collection efficiency between 80% and 85% (use parcticle size distribution given below). you must assume a dpc of 4.2 microns,an inlet gas velocity of 25 m/s and a K of 15.
if the sludge concentration in the return sludge line from the secondary clarifier were the same as the MLVSS concentration.WOULD recycle of return sludge increase the sludge age why
A solution containing 30% methanol (by mol) is flashed to 1 bar, 70.82°C. Determine the phase of the system; if 2 phases, report the compositions and relative amounts of each phase.
Exhaust gas from a chemical process flows at a rate of 8,000 actual cubic feet per minute (acfm) from point A at 250°F and 1 atm pressure. It flows through a circular duct to a fan
H = h - N. At point A, the geoid correction is -100 feet; the ellipse height is 100'. What is the NAVD88 elevation of point A
A full tank (3 m height) discharges water from an output pipe following the equation: W_out = A z^1/2. Calculate the time required to reduce the level to 1 m. Data: A _s = 1 m^2, A = 0.2777 kg (s m^1/2), density water = 1000 kg/m^3
if gas is available at $0.50 per therm and the efficiency of utilization is 80 percent, what is the cost of heating energy in dollars per million Btu
Assume: Suspended solids in effluent negligible Wastage is from aeration tank Yield coefficient = 0.4 Bacterial decay rate = 0.04 1/d Effluent BOD5 = 10mg/L F/M = 0.33 mg/mg*d BOD5 after primary settling = 150mg/L MLVSS = 1700mg/L MLSS = 1.4(MLVSS..
Identical bricks 0.1m wide, and weighting 2kg are placed on a plate (assume the plate has neligible weight). Calculate the total weight (and force F required to balance the plate).
The 5-m long cantilever beam using a W410 x 67 standard wide flange section has a distributed load of 1200 N/m placed on it. It is also supported by a cable at B, of length 2 m with a 7 mm2 cross sectional area. What is the force in the wire
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