In a viscosity experiment the graph of a² (a = radius of the ball) against terminal velocity v has a slope of 4.37 × 10⁻⁶ m s. Find the coefficient of viscosity η if ρ = 7.8 × 10³ kg m⁻³, σ = 1.26 × 10³ kg m⁻³ and g = 9.81 m s⁻².

University of Ilorin PHY107 2026-exam past question

1. 0.032 Pa·s
2. 0.062 Pa·s
3. 0.62 Pa·s
4. 0.38 Pa·s

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