Thread: Beware: E-readers get heavier with each book
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Old 10-31-2011, 03:56 PM   #14
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Quote:
Originally Posted by wayrad View Post
It's either a joke or he skipped the part in chemistry class about mass and energy only being interconverted in nuclear reactions.
Actually it's the opposite of what you claim. Mass and energy are always equivalent, and mass is never lost, not even in nuclear reactions (because the energy in the system remains the same the mass has to stay the same as well per E=mc²).

http://en.wikipedia.org/wiki/Mass–energy_equivalence
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