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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.
water at atmospheric pressure boils on the surface of alarge horizontal copper tube. the heat flux is 90 ofthe critical
a jeep tows a 400kg block uip a 45deg incline. the coefficients of friction between the block and the ground are us0.5
a a 10-mm-diameter brinell hardness indenter produced an indentation 1.62 mm in diameter in a steel alloy when a load
How transformations affect the microstructure and mechanical properties of steel.
Drinking water at 10oC for an office complex must be pumped along a horizontal section of PVC pipe 50 m long at 2 m/s. The pipe has a nominal diameter of 62.5 mm and is Schedule 40. What is the head loss in m?
a feed water pump operates with a flow rate of 350 kgs. the water enters at 420 k. the inlet pressure is 0.7 mpa and
consider a large furnace that can supply energy in the form of heat at 2000 r at a steady rate of 3000 btus. determine
a rectangular intake air duct is 36 in. wide and 24 in. high. it runs for over 300 ft inside a warehouse and is at 50 f
part 1 - energy in the home personal energy use and home energy efficiency.estimate your personal annual energy usage
calculate the quality of the system to begin with. calculate the amount of liquid water to begin with. calculate the heat transfer during the heating process.
The heat transfer coefficient in the oven is 25W/m^2K. Calculate rate of heat transfer per m^2 area.
an electron is released from rest at the negative plate of a parallel plate capacitor and accelerates to the positive
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