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  5. Heat

7th Class Science Heat Question Bank Heat

  • question_answer
    For the effective radiation of heat by an electric room heater, which of the following needs to be done?

    A)  Keep it clean.

    B)  Polish it to shine.

    C)  Paint it green.

    D)  Paint it black.

    Correct Answer: B

    Solution :

    Polished surfaces are good radiators of heat.


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