# Pressure problem

(a) A very powerful vacuum cleaner has a hose 2.86cm in diameter. With no nozzle on the hose, what is the weight of the heaviest brick it can lift? (b) A very powerful octopus uses one sucker, of diameter 2.86cm, on each side of a shell of a clam in an attempt to pull the shells apart. Find the greatest force the octopus can exert in salt water 32.3m deep.

(a) - I'm not sure how I know the power of the vacuum, but I think I'm suppose to use $$P = P_0 + pgh$$ although I'm not sure how.

(b) I have no clue how to do this :-\

Could anyone lend a hand?

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For the first part you need to know what pressure the vacuum cleaner is generating.

Once you have this you need to think about over what area this pressure is acting.

Remember

Pressure * Area = Force

And the force relates to the weight.

The second part is not so different...

Well, the problem doesn't give me the pressure of the vacuum. Is that something I can assume?

HallsofIvy