GKFix MCQ Question

What physical quantities are represented by σ and ρ in the formula for viscosity?

• A. σ is the density of the solid ball, ρ is the density of the liquid
• B. σ is the density of the liquid, ρ is the density of the solid ball
• C. Both σ and ρ represent the density of the liquid
• D. Both σ and ρ represent the density of the steel ball