There is a empty glass jar with a hole at the top . Now glass jar is filled half with
water . Meanwhile a balloon is fully blown and was tied to the mouth of jar
completely covering it.
Now something weird happens . As soon as we cover the mouth of jar with fully
blown balloon , the water which was at the bottom of jar now rises up and starts
to flow through the hole which is at the top . Water continue to flow out till all the
air inside the balloon gets zero .
Now what is the reason behind this ? This is definitely not a witchcraft . It is the
science experiment on atmospheric pressure of air .
Now when we started to fill the jar with water , we were doing it in atmospheric
pressure of air . Now when the fully blown balloon is tied to the mouth of jar then
volume of the air increases .
With temperature remaining same and according to Charles law , volume is
directly proportional to pressure . Hence pressure of air becomes more than
atmospheric pressure .
Now air starts putting this extra pressure on already there water . Meaning it tries
to displace the water from inside of jar . Water finds a way to go out through the
hole .
This process continue till all the extra pressure from air comes back to
atmospheric pressure of air which was earlier .
Surely I had goosebumps when I saw water started to flow outside all of a sudden !!