An unexpected way to inflate a balloon - Numberphile
Using a kamifusen (a Japanese paper balloon). Featuring Tadashi Tokieda. More Tadashi videos: http://bit.ly/tadashi_vids More links & stuff in full description below ↓↓↓ Objectivity...
==========
From a recent trip to Japan, my home country, I brought back a little present. It's a traditional toy. A Japanese toy called "Kamifusen", which means paper balloon. [robot pumping air] And as you can see, it's a balloon made of paper, and there's a hole in there, yeah? So the way you inflate this paper balloon, when you squash it, is to blow into this hole... [Tadashi blowing up balloon] And make it rounder. Okay, but there is another way to make it rounder. [balloon crinkles] You can squash it, and then you can start tossing it around. [Tadashi hitting balloon] You hit it from all sides at random... oops! Now, when you hit something, don't you have the impression that you are denting it and therefore making it less and less round ...
==========
From a recent trip to Japan, my home country, I brought back a little present. It's a traditional toy. A Japanese toy called "Kamifusen", which means paper balloon. [robot pumping air] And as you can see, it's a balloon made of paper, and there's a hole in there, yeah? So the way you inflate this paper balloon, when you squash it, is to blow into this hole... [Tadashi blowing up balloon] And make it rounder. Okay, but there is another way to make it rounder. [balloon crinkles] You can squash it, and then you can start tossing it around. [Tadashi hitting balloon] You hit it from all sides at random... oops! Now, when you hit something, don't you have the impression that you are denting it and therefore making it less and less round ...
