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Science

The Weight of an e-Book 243

Posted by samzenpus
from the because-he-can dept.
whoever57 writes "According to Prof Kubiatowicz from Berkeley, each time an additional book is downloaded to an e-reader, the mass of the e-reader increases. The effect doesn't really make the devices more difficult to carry: the professor calculates that 4GB of books would increase its weight by a billionth of a billionth of a gram— about the mass of a single virus or DNA molecule."
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The Weight of an e-Book

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  • Re:Not true at all. (Score:4, Interesting)

    by niftydude (1745144) on Monday October 31, 2011 @03:06AM (#37892292)

    I think they're talking about flash memory, which does involve confining excess electrons in an isolated piece of material (the "floating gate") to produce zeros.

    Yes - but if the flash memory is formatted - it would be all zeros already.

    So if the book is downloaded - all the extra ones created should release the excess electrons, and actually make the book lighter!!!

    However - if the memory was quick formatted - unwritten memory would be randomly 1 or 0, and adding an ebook would typically keep the same average of 1s and 0s - meaning the reader would on average stay the same weight.

Always draw your curves, then plot your reading.

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