Here is the item.
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The hole on the top is a hole. The device is made out of copper and is hollow.
What the heck is this? 13
Here is the item. The hole on the top is a hole. The device is made out of copper and is hollow.
Rhett Allain is an associate professor of physics at Southeastern Louisiana University. He enjoys teaching and talking about physics. Sometimes he takes things apart and can't put them back together. ... Read More
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