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Consider an aircraft powered by a turbojet engine that has a pressure ratio of 9. The aircraft is stationary on the ground, held in position by its brakes. The ambient air is at 7 degrees C and 95 kpa and enters the engine at a rate of 20 kg/s. the jet fuel has a heating value of 42,700 kj/kg, and it is burned completely at a rate of .5 kg/s. Neglecting the effect of the diffuser and disregarding the slight increase in mass at the engine exit as well as the inefficiencies of engine components, determine the force that must be applied on the brakes to hold the plane stationary.
Helium enters subsonically and flows isentropically through the converging-diverging duct. Compare the values of Ma, T/T0, and P/P0 for helium with those for air at several locations in the duct. Use 0.163 ≤ Ma ≤ 3.221.
a projectile is launched with a speed v0 27.0 ms from the floor of a 4.3-m-high tunnel as shown. determine the maximum
Determine the natural frequencies of the system. For the baseline system I get natural frequencies at the following engine speeds: 435, 2026, 2818, 5225, 7093, 10245, and 12153 rpm.
it takes 0.5 seconds for one to lift the cart handle from 0 to 450 in a linear way around o. if the block has a mass of
consider an ideal fuel cell to be run on pure oxygen and hydrogen for a length of time. determine the ration of the
an open belt drive connects two pulleys 1.2 and 0.5m diameter on parallel shafts 3.6m apart. the belt has a mass of
steam at 1 bar enters an adiabatic heat exchanger with a quality of 0.896 and exits as a saturated liquid. the steam is
you are an industrial hygienist for a large distributor of industrial compressed gases who was evacuated to baton rouge
In the paragraphs that follow, answers are provided to a number of key questions about desogestrel-only pills. What is the desogestrel-only pill?
two of the three velocity components for an incompressible flow are u x2 2xz vy22 yz what is the general form of the
Need help with determining the rate of heat generation required at the welding source to accomplish a weld. A fillet weld is used to join two medium carbon steel plates each having a thickness of 5.0mm.
a 1700 kg car starts from rest at position a and accelerates uniformly up the incline reaching a speed of 100 kmh at
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