Question

Why does not the medicine from the eye dropper flow out?

Answer 1

because when you squeeze the bulb of a pipette, you are removing the air from it and when you dip the end in liquid and release the bulb, the area increases so the pressure in the bulb drops. So due to the atmospheric pressure pushing down on the liquid surface outside the pipette and not having an equal pressure pushing down inside the pipette, the liquid rises into the pipette until the area in the bulb gives an equal pressure to atmospheric pressure......

HOPE IT HELPS U.....