The vessel with mercury absorbed glass capillary channel with a diameter of 1 mm. Determine the surface tension of mercury when the mercury level in the channel will go down below the level of mercury in the vessel is 11 mm. The contact angle considered equal 139 °, and the density of mercury and the acceleration of gravity respectively wound 13.6 x 10 3 kg / m ^ 3 and 9.81 m / s ^ 2.

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