Rankers Physics
Topic: Solid and Fluids
Subtopic: Surface Tension and Viscosity

The terminal velocity of a copper ball of radius 2.0 mm falling through a tank of oil at 20°C is 6.5 cms–1. Calculate the viscosity of the oil at 20°C. (Density of oil is \[1.7\times 10^{3}kgm^{-3}\] and density of copper is \[8.9\times 10^{3}kgm^{-3}\]) :
\[0.69 kg m^{-1} s^{-1}\]
\[0.79 kg m^{-1} s^{-1}\]
\[0.29 kg m^{-1} s^{-1}\]
\[0.99 kg m^{-1} s^{-1}\]

No solution provided for this question.

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