Answers

2015-12-21T20:21:41+05:30
Since there is no air inside there is no pressure but from outside there is high pressure when compared to the inside one so the pressure makes the bottle crushed.
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2015-12-21T21:05:39+05:30
As the pressure is reduced and there is a state of partial vacume which is not sustained by the walls of bottle  and the pbottle crush

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