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Show that the thrust developed by a stationary rocket motor is F = rho*A*U^2 + A(p- p_atm) where p_atm is the atmospheric pressure, and p, rho, A, and U are, respectively, the pressure, density, area, and velocity of the fluid at the nozzle exit.
refrigerant 134a is compressed at steady state from 2.4 bar 0oc to 12 bar 50oc. refrigerant enters the compressor with
argon gas initially at 1 bar 100 k undergoes a polytropic process with n k to a final pressure of 15.59 bar. the work
one end of a tube is closed and the other is open. a 15 g projectile is placed near the closed end is fastened in place
an inventor has proposed a multi-blade wind turbine. the downwind rotor is to have a diameter of 12.2 m. each blade is
a well-insulated rigid tank contains 5 kg of a saturated liquid-vapour mixture of water at
a pistoncylinder arrangement is filled with helium gas. the gas is compressed with a polytropic process with nk. the
multi-stage flash distillation is used to desalinate seawater so it is fit for human consumption. a flash distillation
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 rigid well-insulated tank with a volume of 3 fe contains air at p1 22 lbfin2 and t1 475 bullr. the air is stirred by
water 15 c flows in a horizontal schedule 40 pipe that has a nominal diameter of 0.5 in. the reynolds number is re1000.
air enters a compressor at 179 kpa and 290 k and exits at a temperature of 500.9 k. determine the power kw for the
differentiate between macroscopic and microscopic approaches. which approach is used in the study of engineering
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