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To Suck or Blow
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<blockquote data-quote="AKKAMAAN" data-source="post: 2313015" data-attributes="member: 28646"><p>When you "suck" air out of a bottle, your mouth and lungs create vacuum, the lower pressure inside makes the outside pressure to "push" on the bottle so it shrinks....same with a hydraulic pump....it is the atmospheric pressure that push the oil into the pump....no atmospheric pressure means no "suction", and pump cavitates....</p><p></p><p>Thats also the reason why a cabin on a high elevation aircraft need to be pressurized for the travelers, or they will need pressurized oxygen supplied by masks....</p></blockquote><p></p>
[QUOTE="AKKAMAAN, post: 2313015, member: 28646"] When you "suck" air out of a bottle, your mouth and lungs create vacuum, the lower pressure inside makes the outside pressure to "push" on the bottle so it shrinks....same with a hydraulic pump....it is the atmospheric pressure that push the oil into the pump....no atmospheric pressure means no "suction", and pump cavitates.... Thats also the reason why a cabin on a high elevation aircraft need to be pressurized for the travelers, or they will need pressurized oxygen supplied by masks.... [/QUOTE]
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