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Spontaneous Combustion Explained: Don't Wear Wool Shirts With Nylon Jackets
from the just-saying... dept
Really not quite sure what to make of this story, which seems to have all the elements normally associated with an urban legend. GMSV points us to a Reuters piece describing a man in Australia who made the fashion faux pas of the century. He didn't just clash... he clashed electrically speaking. According to the story, the combination of his wool shirt and synthetic nylon jacket worked up enough static electricity to scorch the world behind him, even setting his office carpet on fire. The guy didn't realize it was his fault until after the firemen evacuated the building in search of the cause of the carpet fire, he noticed that stuff in his car was scorched as well. The firefighters claim that the combination of the shirt and jacket were tested, showing a current of 40,000 volts, "one step shy of spontaneous combustion." Now, if only he could learn to use those powers for good, instead of evil...
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current
Current is measured in amps, not volts. Turn in you nerd badge when you leave.
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Re: current
Read the article... wasn't my quote. As I said... plenty in the article seems sketchy.
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No Subject Given
Wheres snopes.com when you need it :)
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Fashion Nerd vs. Tech Nerd
If you can get 40kv from rubbing wool and polyester together, why do you need a backpack?
MjM
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No Subject Given
I guess the energy crisis is no longer an issue!
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Static electricity
That's a BS story, a balloon on your arm hair can produce 100KV, so his 40KV could in no way set the place on fire.
check this link out for all the yummy details
http://amasci.com/emotor/voltmeas.html
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come on now
Techdirt has been "passing" lately on a lot of interesting stories. I even submit them now and then and never see them get posted. Then crap like this shows up, which is almost certainly not true - but even if it were, WHO CARES?
let's go back to being above-board and relevant here...
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Re: Static electricity
40kV IS enough to light something on fire, as is 12kV. the voltage DOESN'T MATTER, only the AMPERAGE does, as far as ignition is concerned.
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It's all about the current.
Short out a 1.5V AA NiCd battery with a paperclip sometime, the paperclip will glow red hot within seconds, and the battery will get pretty hot too. That's just 1.5V but NiCd batteries can deliver an assload of current. (Warning; this is quite dangerous. Batteries can explode when abused like this. You might want to wear safety glasses and heavy gloves.)
You know that big bright arc you get when welding? There's only about 10V between the work and the electrode, but typically 50 to 150Amps of current.
When you walk over carpet on a hot, dry day you'll regularly build up 40KV of static charge. Touch a doorknob and it hurts, but nothing is likely to catch fire.
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Re: It's all about the current.
..and how much our anti-glair screen produce static current
link
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Re: It's all about the current.
..and how much our anti-glair screen produce static current
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Batteries can explode when abused like this.
translation service
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