Question

Which of the given statements best explains why the cardboard does not fall?
a. the wet cardboard sticks to the glass
b. atmospheric pressure acts equally on the glass and on the cardboard
c. the force of gravity pulling the cardboard is negligible
d. air exerts pressure on the cardboard in the upward direction.

Answer 1

Answer:

The bit (B) is the  answer

Answer 2

Answer:

The Correct answer is Option D

Explanation:

• When you will remove your hand, you will find the card stays in place and the water does not flow out. This is because air exerts pressure on the card from below to keep the card in place. Here, the pressure exerted by air upwards is more than the pressure exerted by water downwards.