Question

why water does not run out of dropper unless the rubber bulb is pressed. why?​

Answer 1

Explanation:

Because the gap between it is so small , when compresed, it is pulled out so it is the reason

Please give me a thank you.

Answer 2

Answer:

Water does not run out of a dropper unless its rubber bulb is pressed, why? ... Water is held inside the dropper against atmospheric pressure. When the rubber bulb is pressed, pressure on water becomes greater than the atmospheric pressure and so water comes out.