For one-centimeter contact widths, given the formula above, I get a resistance of around 7 microohms. Run 100 amps through the coin, and you'd get...
I'll prepare to repeat this here whenever the subject comes up, because you can be sure you won't be seeing it in Sigma's promotional material....
Only if you're waving the probes at the coin from a distance. The Keysight U1252B I just picked up measures down to 0.01 ohm on the 500-ohm range...
So far, it's confirmed with a high level of confidence that I'm absent-minded. :rolleyes: I won't get to it any more tonight; maybe tomorrow...
No, nickels have uniform composition throughout. In fact, it's exactly the same compound that forms the outer clad layers of dimes, quarters, and...
O...kay. I'm not big on watching videos, but it looks like you've found several demonstrations of putting rhodium onto gold, one demo of removing...
I don't have any experience with rhodium plating, but a bit of Googling indicates that step one in the process is cleaning and polishing the piece...
If you've lost 1g of weight from a half, you've likely worn it down to AG. How many AG Kennedys have you seen? I'll try to remember to haul out...
Okay, first, I didn't realize that SF issued any business-strike cents in 1982, but here are two articles that seems to support that:...
It's possible that I'm under 0.1%, but only if you count individual cents and nickels from bags.
Yep. That's part of the reason you'll almost never find them in circulation (the other part is that most proof sets get kept in their boxes,...
@Candygirl7, can you try this, please? Put the piece on a standard sheet of white paper (8 1/2 x 11). Hold your camera far enough above it so...
They were only issued as part of proof sets, so it's really unusual to find them in circulation. Nice find!
Whew. From the tone of your post, I was afraid he'd put it in a slab or something. ;)
According to my college transcripts, there was a time when I could do that kind of derivation. It clearly didn't stick. [IMG]
You seem to be jumping to a lot of conclusions from the assumption that the original picture has accurate color balance. If you take a picture of...
If the seller refused to accept the return, and eBay had to step in to force it, they might let you keep the counterfeit -- at least, that...
No, he did it exactly right. There are two meter units in the numerator, and meter-squared in the denominator; m times m over m squared is 1....
I snoozed, I lost. :( Still might pick up, and perhaps even prefer, the non-hologram version if they appear.
But don't they clog up the... oh, never mind. :rolleyes:
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