216 small identical liquid drops each of surface area A coalesce to form a bigger drop. If the surface tension of the liquid is T, the energy released in the process is

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Aicharya · Accepted Answer

$\begin{aligned} & \mathrm{V}_{\mathrm{i}}=\mathrm{V}_{\mathrm{f}} \Rightarrow 216 	imes \frac{4}{3} \pi \mathrm{r}^3=\frac{4}{3} \pi \mathrm{R}^3 \ 	herefore \quad & \mathrm{R}=\sigma \mathrm{r}\end{aligned}$ $\begin{aligned} & 	herefore \quad 	ext { Energy released, } \mathrm{E}=216 \mathrm{AT}-4 \pi \mathrm{R}^2 \cdot \mathrm{~T} \ & =216 \mathrm{AT}-4 \pi(6 \mathrm{r})^2 \cdot \mathrm{~T}\end{aligned}$ $\begin{aligned} & =216 	ext { AT }-36 \mathrm{AT} \ & =180 \mathrm{AT}\end{aligned}$

216 small identical liquid drops each of surface area A coalesce to form a bigger drop. If the surface…

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