(Answered) A sprinkler rotates with a constant angular velocity see

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A sprinkler rotates with a constant angular velocity, see figure. The flow rate is Q and each arm has an outlet area A.

(a) Determine the torque T necessary to maintain the sprinkler at an angular velocity ω and determine the breaking power. For which ω is it max?

(b) If the sprinkler is torque free, what is the angular velocity?

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