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[url= http://www.guardian.co.uk/technology/2011/oct/26/kindle-weighs-more-when-fully-loaded ]Kindle weighs more when full[/url]
Because the electrons in the battery are charged they have more energy and therefore more mass.
Not that it's enough for anyone to notice. An attogram is 10^-18 of a gram, but even the most accurate scales can only weigh something to 10^-9 of a gram with any degree of accuracy.
Posted : 01/11/2011 10:11 am