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| Home | Research | For Teachers | HISTORY Level 1 Level 2 Level 3 |
PRINCIPLES Level 1 Level 2 Level 3 |
CAREER Level 1 Level 2 Level 3 |
| Gallery | Hot Links | What's New! | |||
| Web Administration and Tools | |||||
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Equipment:
Connect the hose to the blower rather than to the suction end of the vacuum cleaner. Turn the switch on. Hold the hose vertically so the stream of air goes straight up. Release the ping-pong ball into the stream of air about a foot from the nozzle. Slowly tip the nose so that air shoots at an angle. The ball will stay suspended in the airstream. The force of gravity upon the ball tends to make it drop out of the airstream. However, the fast moving airstream lessens the air pressure on the portion of the ball remaining in the airstream, overcoming the force of gravity, which results in the ball remaining suspended.
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Updated: February 23, 1999