Question: When a sphere of radius r1 = 1.2 mm moves in glycerin, the laminar flow is observed if the velocity of the sphere does not

When a sphere of radius r1 = 1.2 mm moves in glycerin, the laminar flow is observed if the velocity of the sphere does not exceed v1 = 23 cm/s. At what minimum velocity v2 of a sphere of radius r2 = 5.5 cm will the flow in water become turbulent? The viscosities of glycerin and water are equal to η1= 13.9 P and η 2 = 0.011 P respectively.

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