Physics · 2014
JEE Main · 19 April 2014, Shift 1 · Q10
A large number of liquid drops each of radius r coalesce to from a single drop of radius R. The energy released in the process is converted into…
A large number of liquid drops each of radius r coalesce to from a single drop of radius R . The energy released in the process is converted into kinetic energy of the big drop so formed. The speed of the big drop is (given surface tension of liquid T, density $\displaystyle \rho$ )
Official answer
(4)
$\displaystyle \sqrt{\frac{6 \mathrm{~T}}{\rho}\left(\frac{1}{\mathrm{r}}-\frac{1}{\mathrm{R}}\right)}$
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JEE Main 2014 Physics question, with the answer from NTA’s final answer key. Where our answers come from.