Question:
On heating water, bubbles being formed at the bottom of the vessel detatch and rise. Take the bubbles to be spheres of radius $R$ and making a circular contact of radius $r$ with the bottom of the vessel. If $\mathrm{r} \ll \mathrm{R}$, and the surface tension of water is $\mathrm{T}$, value of $r$ just before bubbles detatch is:(dencity of water is $\rho_{w}$ )
Correct Option: 3,
Solution:
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