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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.
r-22 undergoes a process between two states. the process has an isentropic compressor efficiency of 80. at state 1 the
a solid shaft l 1.9 m long is supported between two bearings. the shaft rotates at 250 rpm. a 20 degree involute gear
a 25 cm long glass fiber e 72.2 gpa v 0.25 has a fracture strength of 75 mpa. what is the minimum diameter of a fiber
a steel plate is to be attached to a support with three bolts. the plate is 50 mm wide and 11.2 mm thick and the yield
A vertical run of copper tubing, 5 mm in diameter and 20 cm long, carries condensation vapor at 60 °C through 27°C air. What is the total heat loss?
a mountain climber carries a barometer which reads 30.1 in hg at the base of the mountain. after her climb the
for a first order system with a transfer function of 15s2 given a unit step input pleasea. derive the transfer function
a tapered structural steel column with a circular cross-section varies linearly from a radius of 25 mm to 15 mm over a
For the preliminary design a power of 0.5kW/m^3 volume is to be used. Calculate the dimensions of the agitation system, rpm, and kW power.
an airplane wing modeled as a spring-mass system with natural frequency 40 hz is driven harmonically by the rotation of
air is contained in a vertical piston-cylinder assembly by a piston of mass 50 kg and having a face area of 0.01 m2.
a spool of mass m radius r and radius of gyration kg rolls without slipping on an incline whose angle with respect to
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