NEET Physics Fluid Mechanics, Surface Tension & Viscosity / द्रव यांत्रिकी, भूतल तनाव और चिपचिपापन NEET PYQ-Fluid Mechanics, Surface Tension and Viscosity

  • question_answer
    A small hole of area of cross-section 2 \[m{{m}^{2}}\]is present near the bottom of a fully filled open tank of height 2 m. Taking\[g=10\text{ }m/{{s}^{2}}\], the rate of flow of water through the open hole would be nearly:  [NEET 2019]

    A)  \[2.23\times {{10}^{6}}\text{ }{{m}^{3}}/s\]

    B)  \[6.4\times {{10}^{6}}\text{ }{{m}^{3}}/s\]

    C)  \[12.6\times {{10}^{6}}\text{ }{{m}^{3}}/s\]

    D)  \[8.9\times {{10}^{6}}\text{ }{{m}^{3}}/s\]

    Correct Answer: C

    Solution :

    [c] \[Q=AV\]
    \[=A\text{ }\sqrt{2gh}\]
    \[=2\times {{10}^{6}}\text{ }\sqrt{2\times 10\times \text{ }2}\]
    \[=2\times {{10}^{6}}\sqrt{40}\]
    \[=12.6\times {{10}^{6}}\]

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