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JEE Main & Advanced Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन Question Bank Self Evaluation Test - Mechanical Properties of Fluids

  • question_answer
    A soap film of surface tension \[3\times {{10}^{-2}}\] formed in a rectangular frame cam support a straw as shown in Fig. If \[g=10m{{s}^{-12}}\], the mass of the straw is         

    A) 0.006g

    B) 0.06 g

    C)  0.6 g

    D) 6g

    Correct Answer: C

    Solution :

    [c] \[m\times 10=2\times 3\times {{10}^{-2}}\times \frac{10}{100}\] or \[m=6\times {{10}^{-4}}kg=6\times {{10}^{-4}}\times {{10}^{3}}g=0.6g\]


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