Question

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

Answer 1

okay so what's your question from this??

Answer 2

The reason for this is the pressure difference between the inside and outside of the bottle.

Explanation:

• When we blow air into the mouth of the bottle, it moves very fast and hence there is a low-pressure zone at the mouth of the bottle.

• While air inside the bottle is static and hence there is a high-pressure zone.

• When the fast-moving air forces the light weighed crumpled paper the high pressure inside the bottle pushes it out.

• Hence, we observe that the paper comes out of the mouth of the bottle