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Acids

Why does a pa...

Question

Why does a paper slip, held between thumb and finger, get lifted up when we blow air over the paper?

A

Air lifts the paper up.

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B

Disturbance produced in the air

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C

Blowing over the paper reduces the air pressure above the strip.

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D

None of these

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Solution

The correct option is C Blowing over the paper reduces the air pressure above the strip.
The still air below the paper had greater pressure than the moving air above the paper resulting in paper getting pushed up.

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