Question

1. a. Give reasons.

The Level of mercury falls in a barometer while taking it to a mountain.

b A gas balloon bursts when it comes at a high altitude.

Dams are made wider at the bottom than at the top.

d. We do not use water instead of mercury in a barometer

, When the piston of a fountain pen with a nib is dipped into ink and the air is released by pressing it, the ink fills in the pen.​

Answer 1

Answer:

as Atmos pressure decreases

bcz pressure inside ballon is more than Atmos pressure

bcz as we go towards the depth liquid pressure increases as to withstand tha it is made wider

bcz it makes us difficult to read in barometer