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MHT CET202123 Sep 2021Evening ShiftPhysicsMechanical Properties of FluidsActual

Work done in increasing the size of a soap bubble from radius of 3 ~cm to 5 ~cm in millijoule is nearly (surface tension of soap solution =0.03 Nm ⁻¹ )

Options

  1. A0.4
  2. B0.2
  3. C4
  4. D2

Correct answer

A. 0.4

Step-by-step solution

aligned & w =8 T ( r ₂^2- r ₁^2 ) & =8 0.03(25-9) 10⁻⁴ & =0.384 10⁻³ ~J & =0.384 mJ 0.4 mJ aligned

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