Question

place a crumpled piece of paper on the mouth of an empty bottle and it comes outsides when you blow air inside the bottle​

Answer 1

Answer:

ya its true

Explanation:

Because of pressure exerts on the bottle which put out the paper

Answer 2

Answer:

As you blow into the mouth of the bottle the air is moving fastest - so is at the lowest pressure. Inside the bottle, the air is moving more slowly - so a higher pressure. As the pressure is higher inside the bottle than in the mouth this pushes the paper out!

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