A soap bubble has radius \( \mathrm{R} \) and thickness \( \mathrm{...

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A soap bubble has radius \( \mathrm{R} \) and thickness \( \mathrm{d}(\mathrm{R}) \) as shown. It colapses into a spherical drop. Find the ratio of excess pressure in the drop to the excess pressure inside the bubble.
\( \mathrm{P} \)
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