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    Question

    A metal sphere is heated. Which property remains

    unchanged?
    A Density Correct Answer Incorrect Answer
    B Volume Correct Answer Incorrect Answer
    C Surface area Correct Answer Incorrect Answer
    D Mass Correct Answer Incorrect Answer

    Solution

    When heated, a metal sphere expands, so volume and surface area increase, while density decreases. However, mass remains unchanged because no material is lost.

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