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Discussion :: Physics

  1. A needle or a pin floats on the surface of water because of

    2. A.

     Surface tension
    B.

     Surface energy
    C.

     Viscosity
    D.

     Adhesive force

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    Answer : Option A

    Explanation :

    The pin or needle floats because of an invisible elastic skin on the surface of the water. This elastic skin is called surface tension. Surface tension of the water leads to forces strong enough to support the needle’s weight.

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