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Explanation:
(a) The atmospheric pressure of the air outside the balloon is more than the inside pressure of the balloon which causes it to collapse.
(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, the pressure inside becomes more than outside atmospheric pressure and water runs out.
(c) Two holes are made in a sealed tin so that atmospheric air presses the oil at one one hole and oil comes out of the second hole.
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Answer:
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