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Two soap bubbles of unequal sizes are blown at the ends of a capillary tube.

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Two soap bubbles of unequal sizes are blown at the ends of a capillary tube. Which one will grow at the cost of the other?

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Excess pressure inside a soap bubble is inversely proportional to its radius, i.e., p ∝ 1/r.

Therefore, excess pressure inside a small bubble will be more than that inside a bubble. Hence, big bubble will grow at the cost of small bubble.

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