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23 July, 17:37

A very powerful vacuum cleaner has a hose 2.86 cm in diameter. with the end of the hose placed perpendicularly on the flat face of a brick, what is the weight of the heaviest brick that the cleaner can lift?

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  1. 23 July, 19:01
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    F = 75.49 N

    Explanation:

    given,

    atmospheric pressure Po = 1 atm

    Po = 101325 Pa

    diameter = 3.08 cm,

    radius = 1.54 cm

    1 cm = 0.01 m

    1.54 cm = 0.0154 m

    Force = Pressure x area

    area = π r²

    Force = 101325 Pa x π x 0.0154 x 0.0154

    F = 75.49 N

    Weight of the heaviest brick that the cleaner can lift is F = 75.49 N
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