He is the best orator and gives insight into a very complicated subject in very easy language. I observed all his videos in korona pandemic and learned a lot
The tube when spun on a glass table showing black from above, would show orange looking from under the table (i think). It is both stopped at the top and bottom and you just can't see the bottom because it is blocked. Perhaps this is obvious but it wasn't mentioned at the time I was told to imagine it rolling a clear ceiling. It would have been nice to mention that looking at the top is and imagining a glass ceiling is the same as looking at the rotating object from the bottom through a clear surface.
If you didn't know, Numberphile did a video about this, where professor Tokieda himself explained this particular phenomenon. It has some very helpful animations which illustrate the action of the tube much more clearly.
At 5:23 the Professor says, "That the cup does not want to lose its volume." While I appreciate the fact that it may look like that, the vibration in a cup has nothing to do with the volume of the cup but it has to do with the elasticity of the material it is made of. The modes it oscillates are diverse and the first modes are what the professor said and the nodes and antinodes will be decided by the position of the handle as it is heavier and so that would be a deciding point as to how the different modes of oscillation will place and fit themselves around the circumference. I must congratulate the Professor for hinting that ," the cup must not lose its volume as the positioning of all the modes of oscillation would have an inner and an outer movement and it does appear that the volume need to be kept and that hint would enable a student to figure out the shape of the modes that fit around the circumference and to what depth as then the lower part of the cup near the bottom is not so resilient and so " The volume will definitely be kept constant!!" Very enjoyable lectures where "toys" deserve to be looked at in a manner they really deserve.......... and applied entity containing , design, drawing art, mathematics, geometry, science, physics, craft, skills, material science, thermodynamics , fluid mechanics and if you treat heat as electromagnetic wave radiation then one is also dealing with communications and Navier Stokes and Maxwell's equation..................... all that in a little cup! Incidentally if the students are made to talk about it we may include any language will have to be learn............ so there is such a lot when the English Nation ask anyone ," would you like a cuppa!"
In Zen there is the exercise to hear the sound of one hand clapping. Here we have seen the sounds of a one handled cup. We have also seen a two handled cup. What are the sounds of a two handled cup?
He is the best orator and gives insight into a very complicated subject in very easy language. I observed all his videos in korona pandemic and learned a lot
He has a mastermind, experts of 7 languages, and drawing, literature, of course mathematics.
I love his little illustrations so much! He's an amazing speaker.
+1ucasvb He does the drawings himself. He's a super-genius: speaks like 7 languages, is an artist, musician, mathematician, and physicist.
Best video I have watched this year (and I have watched a lot).
i like the way he covers all possibilities and removes the impropable ones just by resoning it out
Opens a random CZcams video on mathematical tricks -> Freeman Dyson shows up. Wheeee!
Opens a random CZcams video on mathematical tricks -> Tadashi Tokieda show up :D
The tube when spun on a glass table showing black from above, would show orange looking from under the table (i think). It is both stopped at the top and bottom and you just can't see the bottom because it is blocked. Perhaps this is obvious but it wasn't mentioned at the time I was told to imagine it rolling a clear ceiling. It would have been nice to mention that looking at the top is and imagining a glass ceiling is the same as looking at the rotating object from the bottom through a clear surface.
If you didn't know, Numberphile did a video about this, where professor Tokieda himself explained this particular phenomenon. It has some very helpful animations which illustrate the action of the tube much more clearly.
At 5:23 the Professor says, "That the cup does not want to lose its volume." While I appreciate the fact that it may look like that, the vibration in a cup has nothing to do with the volume of the cup but it has to do with the elasticity of the material it is made of. The modes it oscillates are diverse and the first modes are what the professor said and the nodes and antinodes will be decided by the position of the handle as it is heavier and so that would be a deciding point as to how the different modes of oscillation will place and fit themselves around the circumference.
I must congratulate the Professor for hinting that ," the cup must not lose its volume as the positioning of all the modes of oscillation would have an inner and an outer movement and it does appear that the volume need to be kept and that hint would enable a student to figure out the shape of the modes that fit around the circumference and to what depth as then the lower part of the cup near the bottom is not so resilient and so " The volume will definitely be kept constant!!"
Very enjoyable lectures where "toys" deserve to be looked at in a manner they really deserve.......... and applied entity containing , design, drawing art, mathematics, geometry, science, physics, craft, skills, material science, thermodynamics , fluid mechanics and if you treat heat as electromagnetic wave radiation then one is also dealing with communications and Navier Stokes and Maxwell's equation..................... all that in a little cup! Incidentally if the students are made to talk about it we may include any language will have to be learn............ so there is such a lot when the English Nation ask anyone ," would you like a cuppa!"
Love you Tadashi
I would have watched him spin that tube thing for hours and hours :(
that teacup pitch difference was more than a semitone. close to a major second I think.
In Zen there is the exercise to hear the sound of one hand clapping. Here we have seen the sounds of a one handled cup. We have also seen a two handled cup. What are the sounds of a two handled cup?
What is it with the shoes? Why does Prof. Tokieda take them off? 2:34
Hey, vsauce! Tadashi here
👌👌👌
Hes the best
I believe that statement to be supported by objective fact.
39:44 man in the front falling asleep?