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  3. 7th Class
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  5. Heat

7th Class Science Heat Question Bank Heat

  • question_answer
    In a vacuum flask, which methods of heat transfer are prevented by the vacuum?

    A) Conduction only

    B) Convection only

    C) Conduction and convection only

    D) Conduction, convection and radiation

    Correct Answer: C

    Solution :

    Conduction and convection cannot happen in a vacuum and only radiation can pass through a vacuum.


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