JEE Advanced 2009 Physics question
Two soap bubbles A and B are kept in a closed chamber where the air is maintained at pressure 8 N/m². The radii of bubbles A and B are 2 cm and 4 cm, respectively. Surface tension of the soap-water used to make bubbles is 0.04 N/m. Find the ratio , where and are the number of moles of air in bubbles A and B, respectively. [Neglect the effect of gravity.]
Answer: 6
Solution
Pressure inside a soap bubble = : N/m², $ = 8 + =
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