Question

10. Give reasons for the following:

(a) A balloon collapses when air is removed from it.
(b) Water does not run out of a dropper unless its rubber bulb is pressed.
(c) Two holes are made in a sealed oil tin to take out oil from it.

Please guys answer it properly don't write all useless thing in the answer...... Fast give the answer. ​

Answer 1

Answer:

A).. When air is removed from the balloon, the pressure inside the balloon (which was due to air in it) is much less than the atmospheric pressure outside and hence the balloon collapses.

B) Atmospheric pressure acting from outside the dropper balances the pressure exerted by water and water does not come out of a dropper. On pressing the dropper inside pressure of water becomes more than outside atmospheric pressure and water runs out.

C) Because When oil comes out through a tin with one hole, the pressure inside the tin becomes less than the atmospheric pressure when two holes are made in the tin, air keeps on entering the tin through the other hole and maintains pressure 'inside'.

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