Question

Give reasons
3
b
The Level of mercury falls in a barometer while taking it to a mountain
A gas balloon bursts when it comes at a high altitude,
Dams are made wider at the bottom than at the top
We do not use water instead of mercury in a barometer
d
e
When the piston of a fountain pen with a nibis dipped into ink and the air is
released by pressing it, the ink fills in the pen.
Pressure
G​

Answer 1

As the atmospheric pressure rises or falls so the mercury level in the tube rises or falls. ... Up a mountain the air pressure is low and so the barometer reading will go down. Any air above the mercury in the tube will actually push the mercury down so giving a low reading for the atmospheric pressure