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Air is used as the working fluid in a simple ideal Brayton cycle that has a pressure ratio of 12, acompressor inlet temperature of 300 K, and a turbine inlet temperature of 1000 K. Determine therequired mass flow rate of air for a net power output of 70 MW, assuming both the compressor and theturbine have an isentropic efficiency of (a) 100 percent and (b) 85 percent. Assume constant specificheats at room temperature.
a cylinder of cross-sectional area a is divided inot tow chambers 1 and 2 by means of a frictionless piston. the piston
an elastic exercise band is grasped and then is stretched. knowing that the tension in portion de of the band is 70
A wooden board AB, which is used as a temporary prop to support a small roof, exerts at point A of the roof a 57-lb force directed along BA. Determine the moment about C of that force.
explain the differences between the otto diesel and stirling reciprocating cycles . discuss the application and energy
steam enters a well-insulated nozzle at 300lbfin2 600 degrees f with a velocity of 100 fts and exits at 40 lbfin2 with
during practice a player p punts a ball b with a speed vo25 fts at an angle theta 60 degrees and at a height h from
the mass of each pulley of the system is m and the mass of the suspended object a is ma. determine the force t
an initially empty canister of volume 0.2 m3 is filled with co2 from a line at 800 kpa 400 k. assume the process runs
a heat engine is operating on a carnot cycle and has a thermal efficiency of 55. the waste heat from this engine is
A small boat hangs from two davits, one of which is shown in the figure. The tension in line ABAD is 82 lb, determine the moment about C of the resultant force exerted on the Davit.
an aircraft is slowed after landing by dual parachutes deployed from the rear. each parachute is 3.66m in diameter. the
Consider a NACA 0009 airfoil that has a plain flap whose length is 0.2c and which is deflected 25. a. Calculate cl and cmc/4 When the geometric angle of attack is 4 degrees, what is the section lift coefficient? Where is the center of pressure?
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