Question

in a fountain pen, ink does not run out by its own. why?

Answer 1

fountain pen has a space in it to store the ink .the nib of the ink takes the ink from that space through gravity and capillary action under which the the ink flows against gravity and rise to the thin walls of capillary.this involves the adhesion and co-adhesion force.due to this capillary action the flow of ink controls in the pen
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