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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?
a simple steam power system has a turbine inlet state of 120 bars and 600c and exhaust pressure of 0.08 bar. the
a balloon behaves so the pressure is p c2v13 c2 100 kpam. the balloon is blown up with air from a starting volume of
liquid chromatography lc flow can be model as a packed bed and is described by the ergun equation. lc systems are often
the sphere of mass m1 travels with an initial velocity v1 directed as shown and strikes the sphere of mass m2. for a
a fuel cell stack consists of 75 fuel cells arranged in series each one 12cm2 in size. the stack operates at 80.c and
Evaluate the effect of the water spray on efficiency (net work out divided by heat input) and net power out per kg/s of dry air coming into the turbine.
a 2-kw pump is used to pump kerosene rho 0.820 kgl from a tank on the ground to another tank 30 m above the ground.
a truck travelling along a straight road at speed 20 km/hr increases its speed to 120 hr/hr in time 15 sec.If its acceleration is constant, determine the distance traveled.
three seconds after a polisher is started from rest small tufts of fleece from along the circumference of the
if block d weighs 300 lb and block b weighs 275 lb, determine the required weight of the block c and the angle theta for equilibrium.
1 determine for each case whether the substance is a compressed liquid superheated vapor or saturated mixture using the
there are two connected spur gears attached to a fixed board at points a and b. the assumptions of the system are that
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