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(a) A very powerful vacuum cleaner has a hose 2.95 cm in diameter. With no nozzle on the hose, what is the weight of the heaviest brick that the cleaner canlift?

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(b) A very powerful octopus uses one sucker of diameter2.95 cm on each of the two shells of aclam in an attempt to pull the shells apart. Find the greatestforce that the octopus can exert in salt water 32.3 m depth.

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