Punjab Medical Punjab - MET Solved Paper-2007

  • question_answer
    The earth absorbs \[1022J\] of energy from the sum every day. The percentage increase in the mass of earth every day will be (mass of earth \[=6\times {{10}^{24}}kg\])

    A) \[1.82\times {{10}^{-10}}%\]

    B) \[1.85\times {{10}^{-15}}%\]

    C) \[1.85\times {{10}^{-17}}%\]

    D) \[1.85\times {{10}^{-18}}%\]

    Correct Answer: D

    Solution :

    Mass equivalent to \[1022J\] of energy                 \[m=\frac{E}{{{c}^{2}}}={{10}^{22}}=\frac{{{10}^{22}}}{{{(3\times {{10}^{8}})}^{2}}}=\frac{{{10}^{6}}}{9}kg\] Percentage increase in mass                     \[=\frac{{{10}^{6}}}{9}\times \frac{100}{6\times {{10}^{24}}}=1.85\times {{10}^{-18}}%\]


You need to login to perform this action.
You will be redirected in 3 sec spinner