Physics - Fluid Question with Solution | TestHub

Typical silt (hard mud) particle of radius$\mathrm{20 }\mathrm{\mu }\mathrm{m}$is on the top of lake water, its density is$2000 \mathrm{k}\mathrm{g}\mathrm{ }{\mathrm{m}}^{-3}$and the viscosity of lake water is$1.0 \mathrm{mPa}$, density is$1000 \mathrm{k}\mathrm{g}\mathrm{ }{\mathrm{m}}^{-3}$. If the lake is still(has no internal fluid motion). The terminal speed with which the particle hits the bottom of the lake is ..........${\mathrm{m}\mathrm{m }\mathrm{s}}^{-1}$