Question

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:

When you put the nib on paper and drag it along, the ink is pulled down a slit in the center of the nib, and down the feed, by capillary action. ... Air enters the pen at the same time through the slit in the nib, and moves in the opposite direction, gradually filling up the reservoir as it empties of ink

Explanation:

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Answer 2

Answer:

Explanation:

When you put the nib on paper and drag it along, the ink is pulled down a slit in the center of the nib, and down the feed, by capillary action. ... Air enters the pen at the same time through the slit in the nib, and moves in the opposite direction, gradually filling up the reservoir as it empties of ink.