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Math Help - Converting mass to energy - Special relativity

  1. #1
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    Converting mass to energy - Special relativity

    The sun produces energy by effectively converting mass into energy via means of nuclear fusion reactions deep in its core. In one second the sun outputs roughly 3.861026 J of energy. How much mass does the sun lose in one second in order to produce this energy? [c=3108 m/s]

    [Specify units of 'kg', 'tons', or 'Mtons' in your answer, metric tons (=tonnes) only! Mtons = mega-tons, ktons = kilotons]
    Last edited by mr fantastic; November 17th 2009 at 04:01 PM. Reason: Changed post title
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  2. #2
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    Use e= mc^2, of course. It should be very easy to solve 3.86\times 10^{26}= m(3\times 10^8)^2.
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