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Oil, with ?=860 kg/m3 and µ=0.06 kg/m ?s, flows through a horizontal pipe of 15 m...

Oil, with ?=860 kg/m3 and µ=0.06 kg/m ?s, flows through a horizontal pipe of 15 m length. The power delivered to the flow is 1 hp. If friction losses are to be neglected and the flow is at the laminar transition point
(a) What is the appropriate pipe diameter?
(b) For this condition, what are Q in m3/h; and
(c) ?W in kPa?

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