FPT 2018 IPT connect | FPT 2018 Physics Fights Classement Problèmes Participants Jurés

1. Ink tree

When a drop of ink is injected inside especially still water, or dropped very close to its surface, it firstly forms a ring of ink which then divides into smaller rings (see video). The process repeats again and again and forms a tree-like structure of ink. What is the maximal number of ring divisions that one can see and how does it depend on the important parameters?

Report Opposition
Centrale Marseille

8,00

Grenoble Alpes Université

6,20

Université Paris-Sud

8,80

7,00

Université de Bordeaux

4,60

École Polytechnique

7,60

Moyenne

6,53

7,53