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Two separate air bubbles (radii 0.002 cm...

Two separate air bubbles (radii `0.002 cm` and `0.004`) formed of the same liquid (surface tension `0.07 N//m`) come together to form a double bubble. Find the radius and the sense of curvature of the internal film surface common to both the bubbles.

A

0.002 m (common film will be concave towards the centre of the smaller bubble)

B

0.004 m (common film will be concave towards the centre of the smaller bubble)

C

0.002 m (common film will be concave towards the centre of the larger bubble)

D

0.004 m (common film will be concave towards the centre of the larger bubble)

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