A) \[2.6\,cm\]
B) \[4.6\,mm\]
C) \[1.2\,mm\]
D) \[6.5\,mm\]
Correct Answer: C
Solution :
Surface tension force + upthrust = weight |
\[(2\pi rT)+\left( \frac{2}{3}\pi {{r}^{3}} \right){{p}_{W}}g=\left( \frac{4}{3}\pi r3 \right){{p}_{S}}g\] |
Substituting the values, we get |
\[r\approx 1.2mm\] |
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