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The propellers of a ship are connected to an A-36 steel shaft that is 60m long and has an outer diameter of 340mm and inner diameter of 260mm. If the power output is 4.5MW when the shaft rotates at 20rad/s, determine the maximum torsional stress in the shaft and its angle of twist.
Mechanical properties of A-36 steel can be found in Appendix B
Five organic compounds (A through E) were tested for suitability for biofiltration control. Their retardation ratios (in order) were 5, 8, 13, 21 and 34.
An activated sludge tank, 30 x 30 x 200 ft, is designed as a plug-flow reactor, with an influent BOD of 200 mg/L and a flow rate of 1 million gallons per day. a. If BOD removal is first-order reaction, and the rate constant is 2.5 days^-1, what is ..
The in-situ bulk density of the sandy silt is 1.92 Mg/m^3 and its average water content is 13%. determine: a) the total volume of the sandy silt that must be removed from the borrow pit for construction of the embankment
A barge measures 10 ft (depth) by 35 ft by 120 ft and weighs 100 U.S. tons. The barge floats in fresh water (specific weight = 62.4 lb/ft3) and is evenly filled with 38,000 bushels of corn (60 lb/bushel).
coal has about 2% sulfur. How many kilograms of sulfur would be emitted from coal fired plints in the US in 1 yr US electricity production is about 0.28 * 10^12 watts, & coal has an energy content of about 30*10^6 J/kg
A paved parking lot section has a uniform slope over a length of 100 m (in the flow direction) from the point of a drainage area divide to the inlet grate, which extends across the lot width of 30 m.
a lower tank contains water while an upper tank contains air with a negligible concentration of water vapor. a tube
A column of dimensions 200 X 300 mm has an effective length of 3m. It is reinforced with 6 HYSD bars of 20mm diameter. Determine the safe load the column can carry using working method of design. Using M20 Concrete.
One method used to store energy during times of low demand is by pumping water uphill into a reservoir. When energy demand exceeds the output produced by power plants, the water is released, moves downhill, and is converted into electricity by a t..
The crane hoists a uniformly distributed load C. the two identical motors at A an power through gearboxes operating at maximum output speed of 100 rpm.the load is lifted by winding cable onto spindles attached to the output shaft of each gear box.
If the temperature of rod CF is increased by 10 degrees C and that of rod BC is decreassed by 40 degrees C, determine the normal stress in rod AD. The rods are two meters long.
a suspension bridge cable of span 100 m and central dip 10 m is suspended from the same level at two towers. the bridge
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