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A high school project involves building a model ultralight airplane. Some of the stu- dents propose making an airfoil from a sheet of plastic 1.5 m long by 2 m wide at an angle of attack of 12o. At this airfoil's aspect ratio and angle of attack the lift and drag coefficients are CL=0.72 and CD=0.17. If the airplane is designed to fly at 12 m/s, what is the maximum total payload? What will be the required power to maintain flight? Does this proposal seem feasible?
an air standard brayton closed cycle receives air at 1 atm and 298 k. the upper temperature and pressure limits are 5
consider an ideal rankine cyle steam power plant with reheat. superheated vapor enters the first turbine stage at 10
hockey player a carries the puck on his stick and moves in the direction shown with a speed va4 ms. in passing the puck
a steam turbine operates at steady state. steam enters the turbine at 2.0 mpa and 350 degc with a specific enthalpy of
determine the force and moment reactions at the support A of the built in beam which is subjected to the sine-wave load distribution.
a piston-cylinder device contains 0.8 kg of an ideal gas. the gas is cooled at constant pressure until its temperature
Describe the four incorrect assumptions concerning robot - arm movement that are most frequently responsible for impact accidents.
if a rectangular box with water accelerates to the right that has the dimensions ofleft side height 40cmlength
Determine the rate of metal removal when the wheel is engaged in the work and if the number of active grits per square inch = 200, determine the average chip length and the number of chips formed per time
a tank has two rooms separated by a membrane. room a has 1kg of air and a volume of 0.5 m3 room b has 0.75 m3 of air
a convergent-divergent nozzle with an exit-to-throat area ratio of 1.616 has exit and reservoir pressures equal to
a walk-in cooler using a vapor compression refrigeration cycle is configured as shown below. the cycle uses cfc22 or
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