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  1. Mercury (density = 13600 kg/m3, σ = 0.49N/mm internal diameter open-ended capillary tube is inserted in the middle of the beaker into the mercury. The meniscus in the tube will be below the external mercury surface by how much distance?

    2. A.
    4.2 mm
    B.
    5.7 mm
    C.
    6.8 mm
    D.
    7.3 mm

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    Answer : Option D

    Explanation :

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