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The subsidized cost of producing water at the El Paso Water Utilities (EPWU) Kay Bailey Hutchison (KBH) desalting plant is $1.56 per 1000 gallons. Under a contract that EPWU has with Fort Bliss, the utility sells water to the Army post at a discounted price of $1.28 per 1000 gallons. (The KBH plant was built on Army property.) If Fort Bliss uses 2 billion gallons of water each year, what is the present worth of the discount for a 20-year period at an interest rate of 6% per year?
a piston cylinder device contains .5 lbs of water initially at 120 pso and a volume of 2ft3. a total of 200btu of heat
a 1000 ft. long bridge with a steel superstructure steel alloy a36 is subjected to seasonal temperature extremes of -40
design a single stage rocket for mars orbital insertion liftoff from mars. required deltavee3.5 kmsec using
determine the mole fractions of polyvinyl chloride and polyvinyl acetate in a copolymer having a molecular weight of
Determine the adiabatic flame temperature for constant pressure combustion of a stoichiometric propane air mixture assuming reactants at 298 k . No dissociation of the products and constant specific heats evaluated at 298 k.
consider an ideal fuel cell to be run on pure oxygen and hydrogen for a length of time. determine the ration of the
air is compressed in a standard compressor. its intital state is 100 kpa at 17 c and its final state is 600 kpa and 57
total power required to overcome viscous resistance and wave drag is 11.4 mw. use the perfomance characteristics of the
dry saturated steam at 7 bar expands reversibly in a cylinder behind a piston until the pressure is 0.1 bar. it heat is
a 2 m3 tank containing nitrogen at 25oc and 500kpa is connected through a valve to another tank containing 3kg of
air initially at 27 degrees c is contained in a piston-cylinder. calculate the minimum work required to compress the
Water flows at the rate of .5kg/s in a 2.5cm diameter tube having a length of 3m. A constant heat flux is imposed at the tube wall so that the tube wall temperature is 40 degrees C higher than the water temperature. Calculate the heat transfer and es..
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