Question

Why do we find it hard to push a glass tumbler down into water?

Answer 1

The air present in the glass tumbler exerts pressure on the water , when the tumbler is pushed down into water verticaly and so we find it hard to push the glass.

Answer 2

the air present in the glass tumbler exerts pressure on the water , when the tumbler is pushed down into water verticaly and so we find it hard to push the glass