How does E=MC^2 convert to Joules?

JoshuaFarrell
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How does E=MC^2 convert to Joules? How can the speed of light measured in m/s and mass measured in grams convert to joules?
 
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Mass is in kilograms.
 
According to wikipedia mass-energy equivalence, 1 joule = 11.1265 femtograms (11.1265x10^-18 grams)

http://en.wikipedia.org/wiki/Joule
 
Thanks Guys
 

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