question_answer

Two soap bubbles A and B are kept in a closed chamber where the air is maintained at pressure a of \[8\text{N}\,{{\text{m}}^{-2}}\]. The radii of bubbles A and B are 2 cm and 4 cm respectively. Surface tension of soap water used to make bubbles is \[\text{0}\text{.04}\,\text{N}\,{{\text{m}}^{-1}}\]. If \[{{n}_{A}}\]and \[{{n}_{B}}\]are the number of moles of air in bubbles A and B respectively. Then the value of \[\frac{{{n}_{B}}}{{{n}_{A}}}\]is ____. (Neglect effect of gravity).    

Answer:

6.0