(adsbygoogle = window.adsbygoogle || []).push({}); 1. The problem statement, all variables and given/known data

The annual energy requirement of the USA is of the order [tex]10^20[/tex] J. If we could find a 100% efficient process that could change matter into energy, how many kilograms of material would be needed to meet this requirement?

2. Relevant equations

[tex]E = mc^2[/tex]

3. The attempt at a solution

Well, i simply sub [tex]10^2^0[/tex] in to [tex]E = mc^2[/tex]

And i obtain, [tex]\frac{10^2^0}{(3.0*10^8)^2}[/tex]

then [tex]m=11,111.1111[/tex]

Is this correct? It looks to me like too simple a question, since this is the last question of my tutorial.

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# Homework Help: Conveting Mass Into Energy Problem

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