question_answer

A soap bubble has a radius 2 mm. The surface tension of soap solutions is T. The work done to double the radius of the bubble is:

A) \[\text{4}\text{T(24 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}\text{)J}\]    

B)  \[\text{4}\text{T(4 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}\text{)J}\]     

C)         \[\text{4}\text{T(2 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}\text{)J}\]  

D)        \[\text{4}\text{T(6 }\!\!\times\!\!\text{ 1}{{\text{0}}^{\text{-6}}}\text{)J}\]