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23 July, 22:33

Fresh water flows through a horizontal tapered pipe. At the wide end its speed is 8 m/s. The difference in pressure between the two ends is 5338 Pa. What is the speed (in m/s) of the water at the narrow end? Round your answer to the nearest tenth.

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  1. 23 July, 22:58
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    8.64 m/s

    Explanation:

    v1 = 8 m/s, v2 = ?, P2 - P1 = 5338 Pa, density of water, d = 1000 kg/m^3

    By the use of Bernoulli's theorem

    P 1 + 1/2 x d x v1^2 = P2 + 1/2 x d x v2^2

    P2 - P1 = 1/2 x d x (v2^2 - v1^2)

    5338 = 0.5 x 1000 x (v2^2 - 64)

    10.676 = v2^2 - 64

    v2^2 = 74.676

    v2 = 8.64 m/s
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