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PhysicsJEE Main 5 Apr 2026, Shift 2·Q8·MCQ·Easy–moderate

Mechanical Properties of Fluids · Surface tension

Eight mercury drops, each of radius rr, coalesce to form a bigger drop. The surface energy released in this process is. (SS is the surface tension of mercury).
  1. (1)8πr2S8\pi r^2S
  2. (2)16πr2S16\pi r^2S
  3. (3)64πr2S64\pi r^2S
  4. (4)4πr2S4\pi r^2S

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