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11th Class Physics Mechanical Properties of Fluids / तरलों के यांत्रिक गुण Question Bank Mechanical Properties of Fluids Conceptual Problems

  • question_answer
    Why is the reading of a mercury barometer always less than actual pressure?

    Answer:

                    Due to property of surface tension, mercury in the tube gets depressed. Consequently, the observed height of mercury in the barometer tube is less than its actual height. Thus, the reading of mercury barometer is always less than the actual pressure.


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