technology interactions
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Air and space technologies rely on aerospace— the study of how things fly. Technology Interactions. To Fly Like a Bird. Humans tried using feathers and wood to construct wings like a bird’s. Humans don’t have the muscle power and hollow bone structure to fly like birds. - PowerPoint PPT PresentationTRANSCRIPT
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Technology Interactions ‹ Chapter Title Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
Technology Interactions
Air and space technologies rely on aerospace—the study of how things fly.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
To Fly Like a BirdHumans tried using feathers and wood to construct wings like a bird’s.
Humans don’t have the muscle power and hollow bone structure to fly like birds.
Humans learned to use technology to fly.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
What Makes Things Fly?An object will not change speed or direction unless a force acts on it.
Thrust is a forward force.
Lift is an upward force.
Fluid friction, or drag, slows down a moving object. Gravity pulls objects toward earth.
Momentum is the connection between how fast an object is moving and the mass of the object.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
ThrustOn jet airplanes, thrust is created by the plane’s engines.
On propeller planes, engines make the propellers spin, creating thrust.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
LiftThe Bernoulli effect: a fast-moving fluid exerts less pressure than a slow-moving fluid.
Airfoil: a shape designed to produce useful motion from the flow of air.
Wings and propellers are airfoils that help create lift.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
Controlling Propeller Airplanes
Ailerons make the plane roll from side to side.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
Controlling Propeller Airplanes
The rudder makes the plane turn left or right.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
Controlling Propeller Airplanes
Elevators make the plane dive and climb.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
Jet Engines
Jet engines use Newton’s third law of motion: for every action, there is an equal and opposite reaction.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
RocketsRockets use Newton’s third law of motion.
Rockets carry their own oxygen with them so they can operate in space.
The nozzle at the base of a rocket’s engine can swivel to direct the hot gases in different directions, allowing the rocket to change direction.
Rockets are powered by solid fuel boosters or liquid fuel boosters.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
Solid Fuel BoostersSolid fuel boosters contain a solid propellant.
Once solid fuel is ignited, it must burn completely.
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Technology Interactions Chapter 7 Air and Space Technologies Copyright © Glencoe/McGraw-HillA Division of The McGraw-Hill Companies, Inc.
Liquid Fuel BoostersLiquid fuel boosters burn liquid hydrogen and oxygen.
Liquid fuel engines can be turned on and off.