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A soap bubble in vacuum has a radius of ...

A soap bubble in vacuum has a radius of `3 cm` and another soap bubble in vacuum has a radius of `4 cm`. If the two bubbles coalesce under isothermal conditions then the radius of the new bubble is :

A

12 cm

B

16 cm

C

25 cm

D

5 cm

Text Solution

Verified by Experts

The correct Answer is:
D
` r _(1) = sqrt(r_(1)^(2)+r_(1)^(2))`
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