Question
A bubble of air $2 \mathrm{~mm}$ in diameter rises in a liquid of viscocity $0.075 \mathrm{SI}$ units and density $1350 \mathrm{~kg} \mathrm{~m}^{-3}$. The terminal velocity of the bubble is about......... $\mathrm{m} / \mathrm{s}$(A) $4 \times 10^{-2}$(B) $5 \times 10^{-2}$(C) $2 \times 10^{-2}$(D) $3 \times 10^{-2}$
Step 1
The diameter is given as $2 \mathrm{~mm}$, so the radius $r$ is half of that, which is $1 \mathrm{~mm}$ or $1 \times 10^{-3} \mathrm{~m}$. Show more…
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