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In a refinery oil (specific gravity S = 0.85, kinematic viscosity v = 1.8*10^-5 m^2/s) flows through a 100-mm-diameter pipe at 0.4L/s. Is the flow laminar or turbulent? A pipe is 4 cm diameter and narrows to a mm diameter. By how much the velocity of the water moving from the larger to the smaller
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