Answered

1. Adjust a paper inside a glass in such a way that the paper does not fall even if the glass is inverted.

2. Now invert this glass and push it straight down to the bottom of a bucket full of water. Take care that the glass does not tilt.

3. Take out the glass and observe if the paper is wet or dry.

4. Give reasons for your answer.



Answer :

GinnyAnswer

Final answer:

The paper stays dry inside the glass when inverted in water due to air pressure and surface tension.


Explanation:

To ensure the paper inside the glass stays dry, a principle known as air pressure comes into play. When the glass is inverted in the water, the air pressure inside the glass is greater than the water pressure outside, preventing water from entering the glass and wetting the paper.

This phenomenon is similar to examples such as holding a paper under a glass of water without it getting wet due to air pressure and surface tension.

By understanding these concepts, we can explain why the paper remains dry even when the glass is inverted underwater.


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