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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 ends of a glass tube become rounded on heating?

    Answer:

                    When glass is heated, it melts to a liquid. The surface of this liquid tends to have a minimum area. Now, for a given volume, the area of the surface of a sphere is minimum. This is why the ends of a glass tube become rounded on heating.


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