4. In a vessel with oil steel ball falls at a constant rate of 0.19 cm / s. The same ball in the vessel with glycerol at a rate falls 0.25 cm / s. To determine the viscosity of glycerin, if the coefficient of viscosity is 20 Poise, ρmasla = 0.8 g / cm3, ρglits. = 1.26 g / cm3.

Detailed solution. Decorated in Microsoft Word 2003. (Target decided to use formula editor)