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31 May, 16:49

The power P of a jet of water is jointly proportional to the cross sectional area A and to the cube of the velocity v.

(a) the equation is P=kA (V) ^3

(b) If the velocity is doubled and the cross sectional area is tripled, by what factor will the power increase?

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  1. 31 May, 17:50
    0
    Hello,

    A: P=k*A*v^3

    B:

    v'=2v

    A'=3A

    P'=k*A'*V'^3

    =k*3A * (2v) ^3=24*k*A*v^3

    Factor=24
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