Name any two devices used in everyday life which work on the existence of atmospheric pressure.

What substance present in our body balances the atmospheric pressure acting on us?

Where will the atmospheric pressure be greater-at ground level or at the top of high mountain ?

If a vacuum is created between two Magdeburg hemispheres joined together, they cannot be separated easily, What presses the hemispheres together ?

What makes a balloon get inflated when air is filled in it?