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What is the surface tension in soap film?

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asked in FM&Compressible by (215k points)

The pressure inside a soap bubble of 50 mm diameter is 25 N/m2 above the atmospheric pressure. What is the surface tension in soap film?

         (a) 0.156 N/m                 (b) 0.312 N/m              (c) 0.624 N/m              (d) 0.948 N/m

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