[Lex Computer & Tech Group/LCTG] Physics/Engineering Question

[Robert Primak]

 Paul Garmon wrote:>> Actually, in this part of the video, you can see it was the top (high voltage) wires:
That makes more sense, given the mass of sand which has been vitrified. Moral of the image: Stay away from downed wires!
(I know the term "vitrification" because my Dad wrote a book called The compacted states of vitreous silica (Studies in radiation effects in solids). He spent part of his career counting interference fringes to detect very small deformations of glass-like substances when they were hit by ionizing radiation, such as conditions expected in the observation windows of nuclear fusion reactors. I never understood the advanced math and physics he worked with, though he tried and tried to teach me. Different learning styles!)
-- Bob Primak
    On Saturday, March 20, 2021, 11:20:29 AM EDT, Paul Garmon <paul.garmon at gmail.com> wrote:  
 
 On Fri, Mar 19, 2021 at 10:21 AM Robert Primak <bobprimak at yahoo.com> wrote:

> ‘Dangerous work of art’ discovered by Illinois firefighters in woods. What
> is it?
> https://www.yahoo.com/news/dangerous-art-discovered-illinois-firefighters-211301393.html
>
> How much energy do you suppose it would take to do this? How many volts
> and amps of electricity got shorted to ground there?
>


Looks like a regular neighborhood wire, but since I don't think a downed
120V wire can do this, maybe it was the feeder?


https://www.facebook.com/fairviewcaseyvilletownshipfpd/posts/2834923623415339?comment_id=2835544366686598
  (see comment by Liz Scholz Donahower: "this event occurred on our
property and we made the initial 911 call. we would be interested to see
this ‘glass’. is it at the fire department? here is video of the event.")

Between 4K and 12K volts?  I don't know the amperage fed to local
neighborhoods, but some electrical info reads as follows:

*Power Supplied by Each Distribution Voltage for a Current of 400 A*
System Voltage (kV) Total Power (MVA)
4.8 3.3
12.47 8.6

 Nothing like the 700KV lines that run across the countryside...



Typically this kind of sand fused glass is found on beaches from lightning
strikes, but sometimes these things are faked... 🤔

  - What Really Happens When Lightning Strikes Sand | Discover Magazine
  <https://www.discovermagazine.com/the-sciences/what-really-happens-when-lightning-strikes-sand-the-science-behind-a-viral-photo>


I (believe I) have seen small bits of lightning fused glass on some of the
Cape Cod beaches, but never any "artistic ones"!


Paul
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