MHT CET Physics question
A thin metal of disc of radius 'r' floats on water surface and bends the surface downwards along the perimeter making an angle '' with the vertical edge of the disc. If the weight of water displaced by the disc is 'W', the weight of the metal disc is [T = surface tension of water] [MHT-CET 2020]
Answer: (A)
Solution
The disc is supported by buoyancy plus the upward component of surface tension along the perimeter, , so weight $= W +
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