Why does the balloon expand in a bell jar with a vacuum pump pumping out the pressure?

Educater

New member
I know that the pressure decreases inside the air, but why does the balloon inflate? What does this have to do with pressure and volume? Why does it go back to its original size when it does have the air?

Why does a suction cup fall in the bell jar with decreased pressure and also, why do marshmallows grow with decreased pressure?
 
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