Question

A small paper ball is kept in the neck of a glass bottle held horizontally. Explain, why, it is difficult to force the paper ball into the bottle by blowing air into the bottle

Answer 1

Dear Student
This is because air occupy space. The ball will not go in by blowing beause the remaing space is already used by air and there is no space left ball to fit .but if we pierce a small hole in side of the bottle and try to force the ball inside then the ball will get inside as the air in bottle goes out through hole
hope this helps you