- #71
Tominator
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Klockan3 said:Anyway, your thing about electomagnets, the problem with your analysis is that when you look at electro magnets strength you look at stable fields. Stable fields never give out any momentum, its just oscillating fields. Oscillating magnet fields becomes electro magnetic radiation in the same way oscillating electric fields creates electro magnetic radiation, they are the same phenomenon.
Well, I meant to turn on electromagnet, which will push off permanent magnet, so both of them will gain momentum. Part of the energy in form of the current will be consumed. If we use the same energy to produce a light beam, to give us some momentum, the momentum gained will be far smaller than the one gained by electromagnet, using the same energy. This does not make sense to me, because you are telling me that light is the most efficient thing to throw off. So how is that possible?
DaleSpam said:Yes, same with the conservation of energy.
You cannot run around either conservation law. All you can do is understand them and use them to accomplish your design goal. TANSTAAFL
Does it mean that conservation of momentum would not work in not closed system? Is it enough to put energy to the system, to make it not closed?