Question

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

Answer 1

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

Explanation

1.Crumple a tiny piece of paper into a ball smaller than an empty bottle 's mouth. On its hand , hold the empty bottle and put the paper ball just inside its mouth. Try blowing the ball on it now to drive it into the bottle.  

2. The interior of the paper does not move.  

3. Due to the greater speed, the air pressure at the mouth of the bottle is decreased. It pushes the air out of the jar. This prevents the movement of the crumpled paper ball inside.