To w hat height can mercury be filled in a resell without any leakage if there is a pin hole of diameter 0.1 mm at the bottom of the vessel. (Density of mercury equals 13.6 cross times 10 to the power of 5 space end exponentkgm-3, surface tension of mercury  -550 cross times 10 h to the power of negative 3 end exponent p N m to the power of negative 1 end exponent Angle of contact with the vessel for mercury=0 to the power of 0)

  1. 16.5 cm
  2. 18.5 cm
  3. 20 cm
  4. 12.5 cm

The correct answer is: 16.5 cm

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