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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
    A soft plastic bag weighs the same when empty as when filled with air at atmospheric pressure. Why?

    Answer:

                   The weight of air displaced by the bag is same as the weight of air inside it. The increase in weight due to the filled air gets cancelled by the up thrust of air. So weight remains same when air is filled in the bag.


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