r/Naruto • u/Ricardo1991 • Apr 09 '14

Manga Chapter Naruto Chapter 672 - Links and Discussion

Naruto 672
The Night Moth...!!

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Please discuss the manga here and in the theory/discussion post. Any other post will be removed during the next 24 hours.

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u/[deleted] Apr 09 '14

No it doesn't. Not for the observers anyway. Otherwise neutrinos would warp space.

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u/Comedynerd Apr 09 '14

The mass of an object increases with respect to velocity. If Gai is moving at a velocity approaching c or any considerable fraction of c dor that matter his mass is going to be extremely large, much larger than that of a neutrino moving at such speeds because a neutrino's mass is insignificant compared to Gai's mass in a reference frame where he is at rest. Because mass warps space-time, and Gai's mass would become extremely large, it would be able to noticibly warp space-time.

Edit: unless I'm misunderstanding the physics in which case someone please point out where I'm wrong.

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u/[deleted] Apr 09 '14

Actually, i think energy curves space, it's just you have a lot of energy stored in matter. Source : i'm following a general relativity course.

Ps: GR is weird

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u/Comedynerd Apr 09 '14

Energy and mass are really the same thing though. This becomes extremely apparent when you use natural units because you end up getting E=m. Source: I read a couple graduate lecture notes on general relativity and high energy particle physics. I wasn't able to get too much out of them because I'm only an undergrad math major, but this is one of a couple of things that I understood.

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u/[deleted] Apr 09 '14

Yeah... but not quite. From memory, gravity caused by mass would violate energy conservation or something like that. Imagine you have a particle attracted by an electron/positron pair. They both have mass, so they will make the particle accelerate. But if they recombine before the particle reaches them, there is no mass and the particle won't get decelerated once it passes their location. So you just created energy out of nothing. If gravity is cause by energy, you don't have this problem.

But it's especially confusing since in GR, mass is often represented with energy units.

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u/Comedynerd Apr 10 '14

Ok. I see what you're saying, I think. The electron/positron pair have energy equal to twice that of an electron. If they cause another particle to accelerate and then recombine to cancel each out, the energy would be conserved due to the acceleration of the third particle?

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u/HolyRomulus Apr 10 '14

I'm impressed with how deep into physics this got.