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REPORT ABUSIVE REPLY
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Message Subject
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Rockets need an atmosphere to propel
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Poster Handle
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Balance242 |
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Post Content
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“The Venturi effect is the reduction in fluid pressure that results when a fluid flows through a constricted section (or choke) of a pipe.” That is how the nozzle works. I already explained how the nozzle favours the fact that the exhaust pushes off the atmosphere. Regardless, a force greater than the force of gravity in the penny must be generated to lift the penny against gravity. I didn’t see that opposite force, therefore you are lying.
Quoting: Balance242 Air is a "fluid" because it's density can be changed by speed or pressure. Because a wing is curved on top, air speeds up, creating a lower pressure(like the air being rapidly sucked out of the penny tube) and that lower pressure creates lift and the wing rises accordingly. I would be lying if I created an entirely different reason for the penny to lift say anti gravity cretin particles... Simple Test: put a penny on the floor, use a vacuum nozzle to try to pick it up starting a foot away from the penny and getting closer until the suction (lower air pressure) lifts it even without your tube over it. Low pressure doesn’t create lift high pressure does. High pressure moves to low pressure. Higher the altitude the lower the pressure. If the vacuum hose is a foot away, you are not creating a pressure difference near the penny. Read it again... I underlined the important part for you. A vacuum cleaner nozzle will lift objects when it gets closer to them. The Venturi principle is why vacuum cleaners work to begin with. Once you understand why a penny lifts in your simple experiment, you will understand why your conclusions are wrong. Are you insane? Venturi principle is pressure changes of fluid flow through different diameters of pipe. Has nothing to due with why the penny is lifted. [ link to en.m.wikipedia.org (secure)] Penny lifts because the airflow from the pipe into the vacuum is strong enough to lift the penny.
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