Question

What is the role of air pressure in filling a syringe with liquid medicine?

Answer 1

Here is your answer.

r: The air pressure plays an important role in the filling of syringe as the liquid medicine rushes into the syringe when air pressure inside it decreases on pulling piston out.

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Answer 2

when we pull out the syringe then the space inside gets vaccum forcing the liquid In contact to rise up

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