Question

the filling of ink in a fountain pen is based on the existence of
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Answer 1

Answer:

The whole process is the combination of gravity and capillary action. The fountain pen has the capability to draw ink from the reservoir through the feed to the nib and transfer it on the paper.

Answer 2

Answer:

the whole process is the combination of gravity and capillary action.

Explanation:

The fountain pen has the capability to draw ink from the reservoir through the feed to the nib and transfer it on the paper .

I think you got the correct answer and explanation and also understand.