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Igor Ivanov earned this badge 4 times
mar 28 at 19:04
Particle colliders: why do they need an accelerator chain
jul 18 '11 at 7:22
What does an atom radiate: a wave packet or a single photon?
mar 15 '11 at 14:45
Why does the mass of an object increase when its speed approaches that of light?
nov 25 '10 at 1:36
A problem inspired by the ice hockey game

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