Math stuff

"Rainbow" (rainbeaux) 12/06/2018 at 17:54 • Filed to: None

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You might remember a while ago when I posted about a math problem I had thought of, involving removing spokes from a balanced wheel in such a way that it remains balanced. Well, it turns out that an almost identical problem already exists, and it’s already proven.

Neat!

Chuckles > Rainbow 12/06/2018 at 18:11

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I use a centrifuge at work and I've never given it this much thought. If the number of tubes I'm using can't be balanced, I just add an extra tube (usually filled with water) to balance it out.

lone_liberal > Rainbow 12/06/2018 at 18:20

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Nice! The 7 tube solution does look weird at first but then when you really look at it with 3 grouped together and the 4 seperated with a space in the middle it makes sense and the forces would balance out once the angles are figured in.

Chariotoflove > Rainbow 12/06/2018 at 18:26

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I’ve been doing this intuitively for almost 30 years in centrifuges, mostly  with 8, 12, and 24 spots , but I never wrote an equation for it.

Nibby > Rainbow 12/06/2018 at 18:48

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wow this video is making my head spin in circles

just-a-scratch > Rainbow 12/06/2018 at 22:21

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Cool. I really like Numberphile. Have you seen the video on the sum of all natural numbers? It’s weird.

Rainbow > just-a-scratch 12/07/2018 at 03:38

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Yeah, it’s really weird! Numberphile is my favorite thing.

Rusty Vandura - www.tinyurl.com/keepoppo > Rainbow 12/08/2018 at 08:10

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I always think it’s cool when I think of something that an expert in that area already thought of. I’m a math teacher and my district brought in this guy who was supposed to be come sort of guru and the stuff, most of it anyway, that he said was so great was stuff that I’d already thought of. And practices that I came up with on my own were already the best practices of others.

But here’s one for you: you are driving a semi truck. You turn left onto a road from a stop sign. Your tractor goes absolutely straight , relative to the road. Will the trailer ever line up perfectly behind the tractor? (All standard, Math-y and Physics-y things apply, like perfectly flat road with no bumps, no steering correction inputs applied, et cetera.)