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Count the collisions! - Colegiul National Mihail Eminescu (Satu Mare - Roumanie) Lycée Bellevue (Alès), Lycée Jean-Baptiste Dumas (Alès)

Titre du sujet: 
Count the collisions!
Etablissement(s) jumelé(s):
A very small ball collides against two walls forming an angle u. How many collisions will occur? Calculate the time needed for the ball to escape outside the angle of walls.
Sujet complet: 
Mots clés:

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Sujet | by Dr. Radut