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A wind turbine of the 3-bladed propeller type, having 50% efficiency, generates 2 MWe when the wind speed is 14 m/s. The air density is 1.2 kg/m3. Under these conditions, the linear speed of the blade tips is 98 m/s. What is the propeller rotation rate in rpm? What is the propeller shaft torque? What is the torque if the turbine above has two instead of three blades?
a moving particle encounters an external electric field that decreases its kinetic energy from 8830 ev to 7750 ev as
the tank has a 180mm diameter and 12 mm wall thickness. knowing that the tank contains compressed air under a pressure of 8 Mpa, determine the magnitude t of applied torque for which the maximum normal stress in tank is 75 Mpa.
If we have |N|(en) + F - W = 0 Where The unit vector of N is give, F components unknown and W is only -3400 j. What is the first step to solve for an unknown.
a partially full can of soft drink is placed at the outer edge of a childs merry-go-round located r 1.5 m from the
The system on site is a pressure sand filter, with a service curve. The filter is backwashed using the feed pump, at a higher flow rate, shown as backwash curve. What is the speed of the pump to achieve the service and backwash flow rates ?
an insulated vertical piston-cylinder device initially contains 11.56 kg of water 6.94 kg of which is in vapor phase.
1.7 lbm object falling at 162 fts enters a viscous liquid and is essentially brought to rest before it strikes the
consider a mass going through a polytropic process where pressure is directly proportional to volume n-1 the process
calculate the incidence it of the tailplane for trim if the elevator deflection e is zero. ii calculate the neutral
Partial Auxiliary View showing the details of the inclined face - supply dimensions for the inclined face only. Select a suitable scale to make the drawing fit on an A3 drawing sheet.
what type of feedback data should we be collecting; in order to make sure that our MPS data, our MRP data, our Aggregate Planning, etc. are all correct?
one kg of execute a carnot power cycle. during the isothermal expansion, the water is heated until is is a saturated vapor the pressure is and the quality is. evaluate the heat and work for each process.
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