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A 1 (one) meter high tank that has a hole with threads for a screw to fit tightly, is immersed to. say 50 (fifty) meters in water where the pressure is about 5 (five) atm. The precition is so good that the screw fits so well as if  there is no hole at all when the screw is driven in (closes) the hole. What pressures are there in the tank when the hole is closed and open.

Closed as per community consensus as the post is not graduate-level
asked Jan 29, 2017 in Closed Questions by delete account (0 points) [ no revision ]
recategorized Jan 30, 2017 by Dilaton

not graduate+ level, vote to close

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