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  1. Surface tension of water when in contact with air is 0.0737 N/m. The difference of pressure between the inside and outside of a droplet of rain water 1 mm in diameter is nearly equal to

    2. A.
    0.15 kN/m2
    B.
    0.20 kN/m2
    C.
    0.25 kN/m2
    D.
    0.30 kN/m2

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    Answer : Option D

    Explanation :

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