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An electric power distributor charges residential customers $0.10 per kilowatt-hour (kWh). The company advertises that "green power."is available in 150 kWh blocks for an additional $4 per month. (green power is generated from solar, wind power and methane sources.) If a certain customer uses an average of 400 kWh per month and commits to one monthly 150 kWh block of green power, what is her annual power bills? What is the average cost per kWh with green power during the year? why does green power cost more than conventional power?
a gas refrigeration system uses helium as the working fluid operates with a pressure ratio of 3.5. the temperature of
offshore oil drilling model the large portion of an offshore oil drill is a long cylinder diameter d and length l that
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what will be the work of adhesion between water and 100si plane wsl if a sessile drop of h2o on the si surface forms an
Water flows at a rate of 20 l/s through a horz pipe dia .03 m. The pressure drop across the valve in the pipe is measured to be 2 kPa. Determine the irreversible head loss of the valve, and the useful pumping power needed to overcome the resulting..
a person pushes a car from rest adn accelerates to 4kmh in 5 seconds. the veolicty stays constant for 1km the first 500
the uniform disk of mass pivots freely on the cart of mass. determine the acceleration of the assembly and the angular
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the system contains a fixed displacement pump with a pressure relief valve set at 1000psi. the system operates 20 hours
a coil spring is stretched by two equal and opposite forces f120n. the wire diameter is 5 mm and the mean coil diameter
Get information about a car engine .drive the ideal performance using the appropriate cycle and compare to the actual performance.
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