How many gallons of gasoline would it take to charge an iPhone?

Re:How many gallons of gasoline would it take to charge an i... by rdtsc on Wednesday February 08, 2012 @12:13PM (#3567350)

> And energy density is one of the key factors behind the reliability

Density can actually be per-mass or per-volume. Per mass hydrogen is pretty attractive.

http://en.wikipedia.org/wiki/Energy_density

Now we just need an efficient, safe and clean way to turn gasoline into electricity and problem solved ;-) right ?

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Re:How many gallons of gasoline would it take to charge an i... by henrikschroder on Wednesday February 08, 2012 @12:21PM (#3567411)

> Per mass hydrogen is pretty attractive.

A bucket of gasoline contains more hydrogen than a bucket of liquid hydrogen, and you can actually keep the gasoline in the bucket.

Hydrogen is awesome as an energy source if you look at the combustion formula and the per-mass energy density. In all other aspects it's a horrible, horrible, horrible fuel. :-)

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Re:How many gallons of gasoline would it take to charge an i... by rdtsc on Wednesday February 08, 2012 @01:54PM (#3567866)

I understand that. Not saying we should use it. Only highlighting that for some domains a different type of energy density can be used.

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