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AP EAMCET202418 May 2024Morning ShiftPhysicsMechanical Properties of FluidsActual

216 small identical liquid drops each of surface area A coalesce to form a bigger drop. If the surface tension of the liquid is T, the energy released in the process is

Options

  1. A360 AT
  2. B180 AT
  3. C90 AT
  4. D120 AT

Correct answer

B. 180 AT

Step-by-step solution

aligned & V _ i = V _ f 216 4 3 r ^3= 4 3 R ^3 & R = r aligned aligned & Energy released, E =216 AT -4 R ^2 ~T & =216 AT -4 (6 r )^2 ~T aligned aligned & =216 AT -36 AT & =180 AT aligned

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