(a) 192π x 10-4 J (b) 280π x 10-4 J (c) 200π x 10-3 J (d) None of these Ans. a (12)
42. The work done in blowing a soap bubble of radius 0.2 m is (the surface tension of soap solution being 0.06 N/m)
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- 42. The work done in blowing a soap bubble of radius 0.2 m is (the surface tension of soap solution being 0.06 N/m)