Question

почему при набирании жидкости в шприц,движение поршня шприца вверх приводит к возникнавению в цилиндре шприца фонтана

Answer 1

Из-за разности давления внутри шприца и атмосферного давления снаружи

Answer 2

Why does drawing liquid into a syringe and moving the plunger upward create a fountain in the syringe cylinder?

When drawing liquid into a syringe and moving the plunger upward, the movement of the plunger creates a decrease in pressure inside the syringe cylinder. This decrease in pressure causes the liquid to flow into the syringe through the needle or opening. As the liquid enters the syringe, it displaces the air or any other substance present in the cylinder.

When the plunger is moved upward quickly, the liquid inside the syringe cylinder experiences a sudden increase in pressure due to the compression of the air or substance that was initially present. This increase in pressure forces the liquid to be expelled from the syringe with a certain amount of force, resulting in a fountain-like effect.