9th Class Science Sample Paper Science Olympiad Model Test Paper-10

  • question_answer
    A wooden log weight 25 kg. If the entire log is made up of electrons, then find the number of electrons in the wooden log.

    A) \[3.3\times {{10}^{31}}\]

    B) \[4.2\times {{10}^{31}}\]

    C) \[2.1\times {{10}^{31}}\]

    D) \[1.2\times {{10}^{31}}\]

    E) None of these

    Correct Answer: E


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