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Jul 18, 2017 at 14:56 comment added gre_gor @learning Portals are not physically accurate. They don't even follow the conservation of momentum. Momentum is a vector not a scalar.
Jul 16, 2017 at 18:41 comment added learning Sure, but they make the portals follow conservation of momentum. This just popped into my head as interestingly contradictory.
Jul 16, 2017 at 18:35 history answered Иво Недев CC BY-SA 3.0