David Collomb

External jury member

Problems graded	Report grade	Opposition grade	Review grade
11. Smashing Spheres	4 (Romania)	6 (Slovenia)	8 (UK)
5. Sparkler	5 (Slovenia)	7 (UK)	6 (Romania)
1. Physics of math	7 (UK)	5 (Romania)	4 (Slovenia)
9. Electrostatic lighter	5 (Croatia)	6 (Brazil)	6 (Switzerland)
10. Droplet sandy fingerprints	8 (Brazil)	7 (Switzerland)	6 (Croatia)
15. Galileo method	8 (Switzerland)	7 (Croatia)	9 (Brazil)
17. Resistor thermodynamics	5 (Switzerland)	8 (Brazil)	10 (France)
1. Physics of math	8 (Brazil)	7 (France)	8 (Switzerland)
10. Droplet sandy fingerprints	9 (France)	7 (Switzerland)	8 (Brazil)