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

Paul Garmon paul.garmon at gmail.com
Sat Mar 20 15:19:48 PST 2021


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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