When a sphere of radius \( r_{1}=1.2 \mathrm{~mm} \) moves in glycerin, the laminar flow is obse...
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0When a sphere of radius \( r_{1}=1.2 \mathrm{~mm} \) moves in glycerin, the laminar flow is observed if the velocity of the sphere does not exceed \( v_{1}=23 \mathrm{~cm} / \mathrm{s} \). At what minimum velocity \( v_{2} \) of a sphere of radius \( T_{2}=5.5 \mathrm{~cm} \) will the flow in water become turbulent? The viscosities of glycerin and water are equal to \( \eta_{1}=13.9 \mathrm{P} \) and \( \eta_{2}=0.011 \mathrm{P} \) respectively.
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