1. The problem statement, all variables and given/known data A solid sphere - 20mm in diameter, σ (specific gravity) = 1.3 dropped in water μ=1*10^-3 and ρ=1000 determine the terminal velocity for the sphere. (hint- guess the value for the drag coefficient then iterate) 2. Relevant equations Fd=(1/2)*Cd*ρ*(U^2)*A 3. The attempt at a solution tried guessing the drag coefficient but have no confidence in estimate or of the next step. (also the relationship equation connecting viscosity, specific gravity and density would be much appreciated). Thank you in advance for your help.