Strange Spinning Tubes - Numberphile
video description
My world becomes even more complex and nuanced every day I become more aware of what that world really is.
Awareness has brought a lot of pain to my life, being able to see the deeper fabric of systems that are interconnected means seeing all the ugly that is obfuscated by the veil of illusion. but it's has also brought back child like play and curiosity and has solidified a desire to keep engaging with my surroundings and grow the beautiful and joyful parts of my existence on planet earth.
I might just be a melodramatic fan boy. So forgive me!
Regardless! Thank you for sharing your knowledge with us all, I don't think many people realize just how special it is that there are people out there who want to share the wisdom/skills they have acquired in life without making people prove they are worthy of possessing the knowledge.
I hope this part of the internet never changes!
Date: 2022-04-08
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Comments and reviews: 9
Mudit
+Numberphile - Question for Brady and Tadashi!
According to the 0th Order theory, you said that the colour from where the cylinder is pushed moves slower as compared to the other colour due to opposite rotation and revolution.
But the Fuller Analysis describes it as rolling of two coins between two plates.
Now correct me if I am wrong, the time taken by both black & orange coins is the same to complete their respective circles.
And it also looks obvious that the diameter of the ceiling and floor circles is also the same.
Both coins cover equal distances in equal times!
Look at the 2 coins independently and we can conclude that both roll with the same angular velocity and the respective colours turn up equal number of times in a single revolution.
Isn't this a contradiction to the first argument?
If the speed of both coins is the same then how can one side be going faster than the other?
Is there really a slow end and a fast end?
reply
+Numberphile - Question for Brady and Tadashi!
According to the 0th Order theory, you said that the colour from where the cylinder is pushed moves slower as compared to the other colour due to opposite rotation and revolution.
But the Fuller Analysis describes it as rolling of two coins between two plates.
Now correct me if I am wrong, the time taken by both black & orange coins is the same to complete their respective circles.
And it also looks obvious that the diameter of the ceiling and floor circles is also the same.
Both coins cover equal distances in equal times!
Look at the 2 coins independently and we can conclude that both roll with the same angular velocity and the respective colours turn up equal number of times in a single revolution.
Isn't this a contradiction to the first argument?
If the speed of both coins is the same then how can one side be going faster than the other?
Is there really a slow end and a fast end?
reply
Amir
So after watching a few of his videos one must ask, how complex is the math he actually works on? because at a first glance any connection between spinning tubes and math seems pretty vague, at least for someone who studies undergraduate level math. Even imagining his day to day research seems crazy to me
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So after watching a few of his videos one must ask, how complex is the math he actually works on? because at a first glance any connection between spinning tubes and math seems pretty vague, at least for someone who studies undergraduate level math. Even imagining his day to day research seems crazy to me
reply
TrasherBiner
Tadashi makes the most interesting math things. I remember the one with the balloon. All his experiments seem to involve materials in 3d and how they appear to us. I find this exciting. Keep it up Tadashi. I know I arrive late to the party, but nevertheless.
reply
Tadashi makes the most interesting math things. I remember the one with the balloon. All his experiments seem to involve materials in 3d and how they appear to us. I find this exciting. Keep it up Tadashi. I know I arrive late to the party, but nevertheless.
reply
Samuel
The end that doesn't roll on the table has more exposure to our eyes watching from the top. It stops periodically and specific spots of our field of vision are exposed to it. If you spin it on a glass table and watch it from the bottom, you see the other color.
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The end that doesn't roll on the table has more exposure to our eyes watching from the top. It stops periodically and specific spots of our field of vision are exposed to it. If you spin it on a glass table and watch it from the bottom, you see the other color.
reply
mateimc
I really liked the video but the concept of the hollow tube from 11: 54 made me giggle. There is no full tube, as that would be called a cylinder. So believe it or not, but all tubes are hollow. The rest of the theory is point on, and rather exciting to watch
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I really liked the video but the concept of the hollow tube from 11: 54 made me giggle. There is no full tube, as that would be called a cylinder. So believe it or not, but all tubes are hollow. The rest of the theory is point on, and rather exciting to watch
reply
TinyFoxTom
I've been studying physics and mathematics for 22 years, and it still manages to surprise me. You guys should do a video about 1-dimensional cellular automata. Bonus points if you apply the method of defining 1-D rules to 2-D CA.
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I've been studying physics and mathematics for 22 years, and it still manages to surprise me. You guys should do a video about 1-dimensional cellular automata. Bonus points if you apply the method of defining 1-D rules to 2-D CA.
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Nick
At the start I felt like I was watching a crossover between Numberfile and Scam School, and any second it's gonna cut to Brian Brushwood and he's gonna teach me something amazing about Euler's number or prime numbers.
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At the start I felt like I was watching a crossover between Numberfile and Scam School, and any second it's gonna cut to Brian Brushwood and he's gonna teach me something amazing about Euler's number or prime numbers.
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Jason
This is insanely smart. Insane, meaning: I can learn it, but I can't memorize it beyond about 3 hours. Too smart for the average brain (respect re: Tadashi. I am glad its available for reference. Great animations.
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This is insanely smart. Insane, meaning: I can learn it, but I can't memorize it beyond about 3 hours. Too smart for the average brain (respect re: Tadashi. I am glad its available for reference. Great animations.
reply
Dance
is the angle of tilt predictable? then the height of the imaginary ceiling is predictable, and the volume of the imaginary cylinder created by the height, floor, and imaginary ceiling is able to be calculated.
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is the angle of tilt predictable? then the height of the imaginary ceiling is predictable, and the volume of the imaginary cylinder created by the height, floor, and imaginary ceiling is able to be calculated.
reply
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