(a) 100 dyne/cm (b) 68.66 dyne/cm (c) 137 dyne/cm (d) 150 dyne/cm Ans. b (36)
9. The pressure of air in a soap bubble of 0.7cm diameter is 8 mm of water above the pressure outside. The surface tension of the soap solution is
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- 9. The pressure of air in a soap bubble of 0.7cm diameter is 8 mm of water above the pressure outside. The surface tension of the soap solution is