J & K CET Engineering J and K - CET Engineering Solved Paper-2014

  • question_answer
    What amount of energy is associated with mass of\[2.5\text{ }kg\]?

    A)  \[6.27\times {{10}^{17}}\,\,J\]

    B)  \[4.27\times {{10}^{17}}J\]

    C)  \[0.27\times {{10}^{17}}\,J\]

    D)  \[2.27\times {{10}^{17}}\,J\]

    Correct Answer: D

    Solution :

    From Einstein's mass energy relation \[E=m{{c}^{2}}\] \[E=2.5\times {{(3\times {{10}^{8}})}^{2}}\] \[=2.5\times (9\times {{10}^{16}})\] \[=22.5\times {{10}^{16}}=2.25\times {{10}^{17}}J\]


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