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The city of Durham, North Carolina, has a population of 100,000, and the daily per capita production of MSW is 4.0 pounds. A horizontal hammermill shredder is to be installed to process the raw waste to a product that is 90% finer than 6 cm. The shredder is to operate 8 hours per day. Assume the n in the RosinRammler equation is 1.0, the Bond work index is 400 kWh/ton, and the raw refuse is 80% passing 20 cm. Estimate the size of the electric motor needed to power this shredder.
saturated steam at 2 mpa is contained in a piston-cylinder arrangement. the initial volume is 0.25 m3. heat is removed
a steel disc 300 mm diameter of mass 29kg is suspended from the end of a wire 2.5 mm diameter and 1.5 m long which is
a rankine cycle steam plant operates between the pressures of 15 mpa and 6 kpa. steam exiting the boiler is 550 degrees
a hydro-electric plant uses an 85 efficient turbine-generator to produce power from a reservoir with a height of 45 m
water is to be pumped from a dam to a storage tank 20 m above at a rate of 70 ls. the electric power needed to achieve
The concentration of a metabolite within the bloodstream is 100 parts per million. Assume that 1000 mg of metabolite is to be used as a tracer, it is injected over 5 min and the downstream concentration is measured to be 4000ppm.
two insulated tanks are connected by a valve. one tank initially contains 1.2 ib of air at 240 f 30 psia and the other
Silicon rubber has a Poisson's ratio of 0.4. Consider a silicon rubber drain hose for a surgical procedure; the hose has an outer diameter of 4 mm and a wall thickness of 0.5 mm. How much does the lumen (interior space) of the catheter constrict if t..
an adiabatic throttle valve operates in a steady-state steady-flow condition with r-134a refrigerant at a flow rate of
How much work(J)is done in a natural rubber filament when strains slowly and non reversely to a= 2?
mr. jones plans to purchase a new 18000 automobile. he wants to borrow all the money for the car and repay it in equal
steam is generated in a boiler. if the initial water enters the boiler as saturated water at 1000 psi a h542.4 btuibm
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