Weighty words

Weighty words

Heavy going...

Heavy going...

If you own an eBook reader, you know it can save you a lot of shelf space: a 4GB model can hold around 3,500 books which would otherwise weigh around 2 tons.

But is a 'full' eBook reader heavier than an empty one?

Yes. Just.

A billionth of a billionth of a gram heavier - about the weight of a DNA molecule.

Bonus Bubblegum

You can thank Einstein and his famous equation for this one (E=MC2), explains computer scientist John Kubiatowicz in his New York Times article

While an eBook reader holds the same number of electrons, to hold them in place requires more energy than if they were left unrestrained within the flash memory (about a billionth of a microjoule for each bit of data stored).

If energy equals mass times the speed of light squared (E=MC2), the mass equivalent of that extra energy calculates to about one 'attogram' - a billionth of a billionth of a gram.    

Read More

Guardian article explaining the science behind the 'heavier' full eBook

Image credit: Maximilian Schönherr, under Creative Commons Attribution-Share Alike 3.0 Unported license. 

"A young man right at the beginning of his career"

"A young man right at the beginning of his career"

King Umberto's uncanny end

King Umberto's uncanny end