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water as fuel - hydrogen?

 
Trailboss
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water powering a car and a welder:
one vid: http://www.youtube.com/watch?v=-MBngiNto0E
another: http://www.youtube.com/watch?v=QapY-I8tJJI

"brown gas": http://www.youtube.com/watch?v=JKCuI9IWfZ4

"brown's fuel": http://www.youtube.com/watch?v=MS5qFTWBbP4

Dr. Yull Brown: http://www.youtube.com/watch?v=K6bfpdBUa2Y&NR

water fuel cell: http://www.youtube.com/watch?v=YIgOn1kRw5s

cars running on "negatively charged water"
http://www.youtube.com/watch?v=c-ulOvJl46U
 
lowercase baba
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I can't watch the videos at work, but I'm skeptical. It takes a LOT of energy to break apart a water molecule to GET the hydrogen out. If that is what they are doing, it's a losing battle.
 
paul wheaton
Trailboss
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It does seem that skeptisism is warranted.

They say that the car went 100 miles on four ounce of water. But there always appears to be some sort of electricity involved somewhere. Is the system fully contained? Is there only water and NOTHING else?
 
fred rosenberger
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I'm pretty sure James Randi has written about this exact thing before. I'll try and dig around on his site when I get home and find the article he wrote. I'm sure I can find some other fellow skeptics who have commented on this as well.

100 miles on 4 ounces of water? that i do NOT believe. If he's done this, then the world is about to SERIOUSLY change for the better. He should be able to get plenty of funding from some environmental group, unless you believe in conspiracy theories and how Big Oil is never going to let this happen.

my guess is that the guy is either a con-artist, or seriously delusional in his grasp of physics.
 
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There already exist hydrogen-powered vehicles. Their method of operation is to burn the hydrogen, producing water plus energy. So if it's also possible to produce energy by splitting water into hydrogen plus oxygen, you could make a perpetual-motion machine.

But you can't make a perpetual-motion machine. And hydrogen-powered vehicles exist. Therefore these water-powered vehicles can't exist.
 
fred rosenberger
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James Randi first commented on this in May of 2006. I would think that if this was legit, we'd have heard about it from a more legitimate news source than YouTube. Maybe Scientific America or Discover would have run a story on it by now.
 
Ranch Hand
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I wish it was all true, but I have difficulty believing it when someone comes out and says they have achieved something that no one else could.
 
Ranch Hand
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Using water as a fuel makes about as much sense as using ashes as fuel. (Unless it's a nuclear powered car using "heavy water" :-)
 
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