Question

water does not run out of a dropper unless it's rubber bulb is pressed.

Answer 1

Water dropper

Explanation:

Water does not run out of a dropper unless its rubber bulb is pressed because of the difference in liquid pressure and atmospheric pressure.

• There are two forces acting on the water inside the dropped. One is the atmospheric pressure outside the dropped and the other is the liquid pressure inside the bulb. When the bulb is not pressure, the water does not come out because the atmospheric pressure is less than the liquid pressure inside the bulb.
• When the bulb is press, the liquid pressure inside the bulb increases. When this pressure becomes greater than the atmospheric pressure, the water will come out of the dropper.

Answer 2

Answer:

Hiii your answer,

When rubber bulb is pressed , pressure on water becomes greater than the atmospheric pressure and so water comes out .

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