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Air (density rho) is the being down on s...

Air (density `rho`) is the being down on soap film (surface tension `T`) by pipe of radius `R` with its opening right next to the film. The film is deformed and a bubble detached from the film when the shape of the deformed surface is a hemisphere. Given that the dynamic pressure on the film due to the air blown at speed `v` is `1/2 rho v^(2)` the speed at which the bubble is formed is

A

`sqrt(T/(rhoR))`

B

`sqrt((2T)/(rhoR))`

C

`sqrt((4T)/(rhoR))`

D

`sqrt((8T)/(rhoR))`

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