Question

Measuring cylinder is filled with water and an Empty glass tumbler is inverted and lower inside the glass beaker state your observation on tilting the tumbler the level of the water in the glass beaker give and reason for your answer

Answer 1

hope it helps

Explanation:

An empty tumbler lowered into a glass beaker containing water on tilting shows bubbles of air coming out because,  

when the tumbler is tilted, water enters inside it and air comes out in the form of bubbles.

But when tumbler is not tilted, the pressure inside the tumbler and outside is same. So the air does not come out and bubbles are not seen.