Elements Of Electromagnetics
Elements Of Electromagnetics
7th Edition
ISBN: 9780190698614
Author: Sadiku, Matthew N. O.
Publisher: Oxford University Press
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Basic Terminology in Mechanics
The area of science and mathematics concerned the motion of the objects, the relation between the force matter, and motion if specified. Forces exerted over the objects result in displacements or changes in the position of an object concerning its enviro…
Question
The military jet aircraft has a gross weight of 28,000 lb and is poised for takeoff with brakes set while the engine is revved up to maximum power. At this condition, air with a specific weight of 0.0753 lb/ft is sucked into the intake ducts at the rate of 112 Ib/sec with a static pressure of -0.28 Ib/in.? (gage) across the duct entrance. The total cross-sectional area of both intake ducts (one on each side) is 1630 in.? The air-fuel ratio is 16.2, and the exhaust velocity u is 2630 ft/sec with zero back pressure (gage) across the exhaust nozzle. Compute the initial acceleration a of the aircraft upon release of the brakes. Answer: a = ft/sec2
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Transcribed Image Text:The military jet aircraft has a gross weight of 28,000 lb and is poised for takeoff with brakes set while the engine is revved up to maximum power. At this condition, air with a specific weight of 0.0753 lb/ft is sucked into the intake ducts at the rate of 112 Ib/sec with a static pressure of -0.28 Ib/in.? (gage) across the duct entrance. The total cross-sectional area of both intake ducts (one on each side) is 1630 in.? The air-fuel ratio is 16.2, and the exhaust velocity u is 2630 ft/sec with zero back pressure (gage) across the exhaust nozzle. Compute the initial acceleration a of the aircraft upon release of the brakes. Answer: a = ft/sec2
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