The competitors of the 2019 International Tournament of Physicists visited CERN between two rounds.
The International Physicists Tournament is an international physics competition addressed to physics undergraduates from all over the world. The 2019 edition took place in Switzerland, at École Polytechnique Fédérale de Lausanne. The tournament consists of Physics problems that have to be solved by the teams.
You can view the results here and try to solve the physics problems listed on this page.