143. Задачка по химии №014 3215

7.1. Calculate the surface tension of mercury if in a glass capillary with a radius of 0.16 * 10–3
  m its column dropped to 0.012 m below the level of mercury in the vessel. The density of mercury is 13.6 * 103 kg / m3. The wetting angle is 130 °.

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