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Tractor Talk Discussion Forum

just wonderin

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coflyboy

01-02-2007 12:16:31




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Electicity is the flow of electrons. Electrons have 'no' mass or weight. What makes the snapping sound when high voltage arcs?




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Kent in KC

01-03-2007 13:45:48




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 Re: just wonderin in reply to coflyboy, 01-02-2007 12:16:31  
Pie = e pluribus unum. Squared. However, the snapping sound you hear could be associated with a woman.



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KEB

01-02-2007 20:10:05




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 Re: just wonderin in reply to coflyboy, 01-02-2007 12:16:31  
The sound you hear is the rapid expansion of the ionized air in the arc channel as it heats up from the current flow. Thunder on a miniature scale.

The heat produced is also what ignites a fuel/air mixture in an engine's combustion chamber. As an interesting side note, most of the damage caused by a lightning strike is a result of the large current flow through the affected material, not the hot channel itself.

Keith

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buickanddeere

01-02-2007 15:51:08




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 Re: just wonderin in reply to coflyboy, 01-02-2007 12:16:31  
Electrons most certainly have weight, take up space and have a charge. Vacuum tubes wouldn't work otherwise. 9.10938188 X 10-31 Kg per electron. Plasma is way more than fire. Fire is a chemical reaction. Plasma is charging an atom to a high enough energy level that most or all the electrons are torn loose from thier orbits. We are talking temperatures in the 100's of thousands and even millions of degrees. The snap can be a sonic boom of rapidly expanding air pushing a shock wave in front. Air rushing back into the low pressure area behind will make more of a "thump".

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coflyboy

01-03-2007 19:06:34




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 Re: just wonderin in reply to buickanddeere, 01-02-2007 15:51:08  
I knew I would get nailed on that 'no mass' of an electron. That's why I put it in ' '.



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RAB

01-02-2007 12:47:18




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 Re: just wonderin in reply to coflyboy, 01-02-2007 12:16:31  
You mean like thunder associated with lightning?

It is simply the very rapid expansion of the air due to the icrease in temperature, as the current passes (W = I2*R etc). Huge resistance (initially).
As the air heats up, the expansion makes the sound. The shock wave is supersonic so the energy which/when/if it reaches us is the sonic boom of the lightning passage. Simple as that.
Regards, RAB

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Stumpalump

01-02-2007 12:30:24




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 Re: just wonderin in reply to coflyboy, 01-02-2007 12:16:31  
I'm going to guess. It's the sound of the air rushing back into the space once occupied by the electrons.



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Raleigh Boulware

01-02-2007 13:01:13




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 Re: just wonderin in reply to Stumpalump, 01-02-2007 12:30:24  
Well when I ment that the arc was splitting the air. I did not mean that the Electorns were taking up space where O2 Molecules were. That would not make sense. It has to do with the plasma effect as a whole..Plasma is nothing more than fire.

sorry for the confusion



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Raleigh Boulware

01-02-2007 12:28:38




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 Re: just wonderin in reply to coflyboy, 01-02-2007 12:16:31  
When you have a big Potntial differance that is High enough to cause an Arc in free space. What is actually happening is the Arc you see is nothing more than Plasma. Which is what 90% of what the univers is made of.
Whan the plasma is form it is actually spliting the air and and causeing O2 and other atoms to react. So what you are hereing is this chemical reaction and the air spliting..
It is the exact same concept as is with thunder.

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IBorange in TX

01-02-2007 14:39:05




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 Re: just wonderin in reply to Raleigh Boulware, 01-02-2007 12:28:38  
Just wondering, if there is no one around to hear the expansion of the heated air, is there still thunder????? ??



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low budget

01-02-2007 15:27:02




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 Re: just wonderin in reply to IBorange in TX, 01-02-2007 14:39:05  
If a man says something and there's no woman around is he still wrong?



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