question_answer

The radii of two soap bubbles are r1 and r2. In isothermal conditions, two meet together in vaccum. Then the radius of the resultant bubble is given by [MP PMT 2001; RPET 1999; EAMCET 2003]

A)             \[R=({{r}_{1}}+{{r}_{2}})/2\]

B)                      \[R={{r}_{1}}({{r}_{1}}{{r}_{2}}+{{r}_{2}})\]

C)             \[{{R}^{2}}=r_{1}^{2}+r_{2}^{2}\]

D)                      \[R={{r}_{1}}+{{r}_{2}}\]