SSC General Science & Technology Sample Paper NCERT Sample Paper-1

  • question_answer
    Hot coffee is poured simultaneously in four metallic tumblers painted outside with different types of paints. After some time, the coffee will be found coldest in the tumbler painted:

    A)  Shining black    

    B)  rough white

    C)  Rough black     

    D)  shining white

    Correct Answer: C

    Solution :

    [c] A black body is not only a perfect absorber but also a perfect emitter of heat. Hence the black container will cool down faster.

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