Science Memes

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Virgin Physicists (lemmy.world)

submitted 3 days ago by [email protected] to c/[email protected]

47 comments fedilink hide all child comments

cross-posted from: https://lemmy.world/post/27589038

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[–] [email protected] 3 points 3 days ago (2 children)

Can you even measure that accurately? Like is it physically possible?

[–] [email protected] 4 points 2 days ago* (last edited 2 days ago)

Based on some rough calculations... no. A precision of 0.0000000000001 ohms is 1000x less than the resistance of 1um of copper with a diameter of 1cm (A piece of wire 10,000x wider than it is long). I'm sure a few molecules of air between your contact points would cause more noise in the measurement.

[–] [email protected] 1 points 2 days ago (1 children)

I thought it had to do with physicists working off theoretical calculations finding precise values for the circuit and not realizing that components come in discrete values.

[–] [email protected] 2 points 2 days ago (1 children)

Yeah, but they could just calculate the right mix of parallel and series discrete resistors to get there.

It’s gonna make a long BOM though.

[–] [email protected] 1 points 2 days ago

Lol, I was actually going to add that but decided it would be too pedantic if I said it myself.