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How is a modern passenger aircraft brought to halt after landing? Considering the enormity of a modern jetliner and the momentum involved.
for a certain material failures were reported after 3000 hours at 650 c and 186 hours at 700 c when loaded at 250 mpa.
The rack structure will be built 2 ft above floor level, and the clearance between the rack structure and the ceiling of the building must be at least 18 in. Determine the dimensions (height, length, and width) of the rack structure.
if p 400 and the coefficient of kinetic friction between the 50- crate and the inclined plane is 0.25 determine the
a river has a steady speed of 0.461 ms. a student swims upstream a distance of 1.00 km and swims back to the starting
Carbon dioxide flows in a horizontal duct at 7 bar abs. and 300 K with a velocity of 20m/s. At a dowstream section, the pressure is 3.5 bar abs and the temperature is 280 K. if 1.4 x 10^4 j/kg of heat is lost by the fluid between these locations.......
a piston-cylinder contains 0.1kg of superheated steam at 180 degrees celsius and 5 bars. the pison is frictionless and
the presence of raindrops in the air during a heavy rainstorm increases the average density of the air-water mixture.
Refrigerant 22 enters an insulated compressor operating at steady state as saturated vapor at - 16 C with a mass flow rate of 1.5 kg/s. Refrigerant exits at 7 bar, 70 C. Changes in KE and PE from inlet to exit can be ignored. Determine: (a) the volum..
A piston cylinder device initially contains .056 m3 of nitrogen gas at 150 kpa and 105 c. the nitrogen is now expanded to a pressure of 90 kpa poly tropically with a polytropic exponent whose value is equal to the specific heat ratio (called isentrop..
flow and pressure measurements are used to estimate the friction factor for a pipeline. the length of the pipeline
The element of an electrical heating device is a cylinder with a diameter of 12 mm and a length of 20 cm. The electrical energy is dissipated at a rate of 800 W. The air at 20°C moves in a cross flow over the heater with a velocity of 8 m/s.
An open cylindrical tank that is 2 ft in diameter and 4 ft high is full of water. If the tank has a 2 in diameter hole in the bottom, how long will it take for half of the water to drain out, if friction is neglected?
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