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    Question

    A circular plate, a cube and a sphere, all made up of

    same material and having the same mass, are heated to 300°C and left in a room. Which of them will have the slowest rate of cooling?
    A Circular plate Correct Answer Incorrect Answer
    B Cube Correct Answer Incorrect Answer
    C Sphere Correct Answer Incorrect Answer
    D All will cool at the same rate Correct Answer Incorrect Answer

    Solution

    In the late of 17th century British scientist Isaac Newton studied cooling of bodies. Experiments showed that the cooling rate is approximately proportional to the difference of temperatures between the heated body and the environment.

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