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Discussion :: Heat Transfer

  1. A steel sphere of radius 0.1 m at 400°K is immersed in an oil at 300°K. If the centre of the sphere reaches 350°K in 20 minutes, how long will it take for a 0.05 m radius steel sphere to reach the same temperature (at the centre) under identical conditions ? Assume that the conductive heat transfer co-efficient is infinitely large.

    2. A.
    5 minutes
    B.
    10 minutes
    C.
    20 minutes
    D.
    40 minutes

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    Answer : Option A

    Explanation :

    No answer description available for this question.

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