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Large wind turbines with blade span diameters of over 100 m are available for electric power generation. Consider a wind turbine with a blade span diameter of 100 m installed at a site subjected to steady winds at 8 m/s. Taking the overall efficiency of the wind turbine to be 32 percent and the air density to be 1.25 kg/m3, determine the electric power generated by this wind turbine. Also, assuming steady winds of 8 m/s during a 24-hour period, determine the amount of electric energy and the revenue generated per day for a unit price of $0.06/kWh of electricity.
a pistoncylinder arrangement with a linear contains r-134a at 60 f x0.6 and a volume of 0.7ft3. it is heated to 140 f
a removable bracket must be attached to the frame of a machine tool as a support. the need for interchangeability
air was heated by an electric resitance heater in an insulated piston-cylinder device. the piston weight remained
the net potential energy between two adjacent ions en may be represented by sum of -ar brn. calculate the bonding
How do you the bubble point temperature and Vapor mole fractions at the bubble-point for a mixture at 690kPa that is 10.0mol % ethylene, 40.0 mol % ethane, and 50.0 mole % propane. Use the Depriester chart.
water flows through a 20-cm commercial steel pipe at 20 degrees celsius. the flow rate is 80 liters per second and
a 2.7 cm diameter rod consists of three cylindrical segments placed end to end in intimate contact aligned aong a
an engineering student measures an ambient lab pressure and temperature of 405.35 in. h2o and 70.5 f respectively and
determine the number of automobiles with premair catalyst treated radiators needed to reduce the ozone concentration in
a thin plate moves between two parallel horizontal stationary flat plates at a constant velocity of 5 ms.the two
consider the thin-walled beam section illustrated in the figure below. the beam has a vertical load of v 500 kn acting
the annual cost of operating a heat pump at year-end prices is r with units of yr. the costs are expected to inflate at
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