Question

3. It is due to atmospheric pressure that ink gets filled into a fountain pen.Give reason​

Answer 1

Explanation:

As higher altitudes, the pressure decreases.

The pressure at higher altitudes is comparatively less, so to equalize the pressure difference ink starts moving out from the pen which has a relatively high pressure

Answer 2

Answer:

the pressure of the ink inside the tube of a fountain pen is atmospheric pressure which is high while the outside pressure is low. Due to pressure difference at high altitude, the air column exerts a pressure on the ink of the fountain pen. As a result, the ink in the tube is forced to move upwards.