What happens when you blow air above the top of a sheet of paper?
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It will blown to other side or it be there only. ....
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Now let's consider the first case where you blow over the sheet of paper. The paper would not rise if it were flat, even though you are blowing air across the top of it at a furious rate. Bernoulli's principle does not apply directly in this case. This is because the air on the two sides of the paper did not start out from the same source.
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