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HV water bridge?

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Conundrum
Sat Sept 29 2007, 09:12PM Print
Conundrum Registered Member #96 Joined: Thu Feb 09 2006, 05:37PM
Location: CI, Earth
Posts: 4061
Link2

"Water forms bridge when exposed to high voltages"

hmm... interesting. wonder if you could make a n mile long bridge this way, in a vacuum? :)

"Waterworld" anyone? lol

-A
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Alex
Sun Sept 30 2007, 12:19AM
Alex Geometrically Frustrated
Registered Member #6 Joined: Thu Feb 02 2006, 04:18AM
Location: Bowdoin, Maine
Posts: 373
Hah, that's pretty neat. I think gravity would be more of a problem than the breakdown voltage of air. You can only put so much current through there to hold up the bridge before you get boiing water.
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Bored Chemist
Sun Sept 30 2007, 11:39AM
Bored Chemist Registered Member #193 Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
Water in a vacuum? That would be interesting.
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Andrew L.
Sun Sept 30 2007, 03:02PM
Andrew L. Registered Member #515 Joined: Sun Feb 11 2007, 02:06PM
Location: Slovenia/Ljubljana
Posts: 94
Wouldn't it start to boil in vacuum?
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Experimentonomen
Sun Sept 30 2007, 04:05PM
Experimentonomen Registered Member #941 Joined: Sun Aug 05 2007, 10:09AM
Location: in a swedish junk pile
Posts: 497
Yes, and then freeze to ice.
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Tesladownunder
Sun Sept 30 2007, 05:39PM
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
This is my HV and water topic from my site. The most interesting stuff is with deionised water which is non-conductive so charge will be held and not leak away. You can make interesting columns of non-flowing water.

I haven't tried the water bridge stuff though. I was in the process of cleaning a titanium electrode to put in the water which will be less likely to ionise than say copper. De-ionised water becomes conductive after a minute or so in use.

TDU
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Electroholic
Sun Sept 30 2007, 08:17PM
Electroholic Registered Member #191 Joined: Fri Feb 17 2006, 02:01AM
Location: Esbjerg Denmark
Posts: 720
wouldn't Pt / graphite be more suitable as inert electrodes?
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Bored Chemist
Mon Oct 01 2007, 05:46AM
Bored Chemist Registered Member #193 Joined: Fri Feb 17 2006, 07:04AM
Location: sheffield
Posts: 1022
Even deionised water conducts slightly.
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Tesladownunder
Wed Oct 03 2007, 02:29PM
Tesladownunder Registered Member #10 Joined: Thu Feb 02 2006, 09:45AM
Location: Bunbury, Australia
Posts: 1424
I replicated the experiment with deionised water, two drinking glasses and my MOT multiplier that goes to about 9kV. Ruler has 1mm gradations.

TDU
1191421755 10 FT32063 Hvwaterbridge
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ragnar
Wed Oct 03 2007, 03:00PM
ragnar Registered Member #63 Joined: Thu Feb 09 2006, 06:18AM
Location:
Posts: 1425
Beautiful photograph, Peter! I like it how you can observe the different anode/cathode shapes that form at each end as well.
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