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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 dust generally settles down in closed room?

    Answer:

                    Dust particles are spheres of small radii. After acquiring the terminal velocity, they start falling through air with uniform speed. As the terminal velocity for small dust particles will be very small, they will settle down in a closed room after some time.


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