4. The cork ball (density ρ = 0.2 g / cm3) with a diameter d = 6 mm float in the vessel filled with castor oil (density ρ` = 0,96 g / cm3), a constant velocity υ = 1.5 cm / from. Identify for castor oil: 1) dynamic viscosity η; 2) kinetic viscosity ν.

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