If a ball of steel (density $\mathrm{\rho }=7.8\mathrm{g}{\mathrm{cm}}^{-3}$) attains a terminal velocity of $10\mathrm{cm}{\mathrm{s}}^{-1}$ when falling in a tank of water (coefficient of viscosity ${\mathrm{\eta }}_{\text{water }}=8.5\times {10}^{-4}\mathrm{Pa}.\mathrm{s}$) then its terminal velocity in glycerin ($\mathrm{\rho }=1.2\mathrm{g}{\mathrm{cm}}^{-3},\mathrm{\eta }=13.2\mathrm{Pa}.\mathrm{s}$) would be, nearly