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A garden hose with an internal diameter of 1.9 is connected to a (statoinary) lawn sprinkler that consists merely of an inclosure with 24 holes each 0.13 cm in diameter. If water in a hose has a speed of 0.91 m/s at wat speed does it leav the sprinkler holes

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Let us consider the velocity of sprinkler is V2 rate of mass flow will same at a time so incoming mass flow = outgoing mass flow so from the principle of continuity A1 V1 = A2V2 since sprinkler is is N = 24 then A1V1 = NA2V2pi* (D1 / 2)^2 *V1= pi*(D2/2)^2*V2V2 = D1^2*V1 / ND^2V2 = (1.9x10^-2)^2 *0.91 / 24*(0.13x10^-2)^2V2 = 8.1 m/s^2

Posted on May 14, 2014

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I just had the same thing happen to me. You have to turn the arms counter clockwise...opposite of the tightening bolts, and have them pointing in opposite directions to get it to turn. If the unit moves backwards, turn them another 180deg to the opposite directions, and it should go forward.

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