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BITSAT2014PhysicsMechanical Properties of FluidsActual

The work done in blowing a soap bubble of surface tension 0.06 Nm ⁻¹ from 2 ~cm radius to 5 ~cm radius is

Options

  1. A0.004168 ~J
  2. B0.003168 ~J
  3. C0.003158 ~J
  4. D0.004568 ~J

Correct answer

B. 0.003168 ~J

Step-by-step solution

aligned W &= S A =0.06 4 ( r ₂²- r ₁² ) &=0.003168 ~J aligned

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