Physics

Water flows into one end of a horizontal, cylindrical pipe at 2.0 m/s. The pipe then narrows until
its diameter at the opposite end is only 1/3 of that at the beginning.
(a) What is the flow speed at the narrow end of the pipe?
(b) What is the pressure difference between the wide and narrow ends of the pipe?

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  1. a: area1*velocity1=area2*velocity2

    b) you have the difference in velocity1 and 2, solve for pressure difference.

    P1*speed1=p2*speed2
    p1*speed1=P1*area1/area2*speed1
    P1=P2*9
    P1-P2=pressure difference
    P1-1/9P1=pressure differnce

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