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1. A liquid is flowing at 11,400 l.h-1 along a pipeline having a diameter of 4 cm. If the liquid has a density of 1 g.ml-1 and viscosity of 0.001kg.m-1.s-1, then the liquid would be in the
(A): any of the phase
(B): laminar phase
(C): transient phase
(D): turbulent phase
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