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2015-08-17T21:41:57+05:30

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Because when there was air inside the bottle their was some pressure on the bottle but when we will we will remove that air that pressure will automatically remove and the bottle gets crushed.

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2015-08-23T14:30:38+05:30
As when there was air in the bottle the pressure exerted on it from outside was nullified by the air exerting pressure from inside. but when air from inside was removed there was nothing to nullify the pressure exerted on bottle from air outside.so it gets crushed

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