Physics
Give reasons for the following:
Water does not run out of a dropper unless its rubber bulb is pressed.
Answer
There are two forces acting on the water inside the dropper one is liquid pressure from inside and atmospheric pressure from outside. Atmospheric pressure acting from outside balances the liquid pressure from inside so water does not come out from the dropper. When bulb is pressed the liquid pressure increases than atmospheric pressure and water comes out from the dropper.
Related Questions
Describe the crushing tin can experiment. What do you conclude from this experiment?
How does the atmospheric pressure change with altitude?
Give reasons for the following:
Two holes are made in a sealed oil tin to take out oil from it.
Give reasons for the following:
A balloon collapses when air is removed from it.