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  1. nucleartear

    Some doubts on relativity

    Oh! I see where is the problem with the example... Thanx! I thought that we could make a kind of time-rate-map if we know all the objects and their velocity at the scene... and it would depend on the reference as we designated the zero-point in a metric... I see now that was not right...
  2. nucleartear

    Some doubts on relativity

    Thanx for your reply! But... (please, sorry if I'm bothering to you!!:smile:) ...I'm trying to find the relation between A, B and C, so I'm trying to make a mental-experiment where the trip towards the universe doesn't create any problem... You are analyzing the differences between...
  3. nucleartear

    Some doubts on relativity

    Yes, for this reason I say: "The unic forces involved are used to make the trip, so the three brothers have been put under the same forces, so we can't use them to try to find the solution." Yes, I have considered this situation and the other two possible situations: A is not moving...
  4. nucleartear

    Some doubts on relativity

    Thanx for the detailed explanation of the twin-paradox! I have saved a copy of your text in my computer! So, one of them will be younger and it doesn't depend on the reference. It only depends on who has received the forces. (let me know if I have understood it badly) So, in the...
  5. nucleartear

    Some doubts on relativity

    Well, I'm still thinking on it... and maybe the "natural" reference is the center of masses (I don't know if that's the word in english, u know: Rmc = [R1·m1 + R2·m2 +...+ Rn·mn] / [m1 + m2 +...+mn], where R is de vector-position and m the mass) Can anyone tell me if that could be right? Oh...
  6. nucleartear

    Some doubts on relativity

    To Janus, zoobyshoe and Sonty: That point of view is very interesting and makes me thinking... You actually say that the time flows at the same velocity, but if we make a mesure of the time in the moving-object while we are at the static-reference we will detect it flows slower at the...
  7. nucleartear

    Some doubts on relativity

    So, I was thinking in it, and, if we see at the experiments we have: - The satellites orbit around the Earth with a big velocity respect to the Earth, and their time goes slower than at the Earth (the GPS system needs to coordinate the clocks of the satellites every time!) - The experiment...
  8. nucleartear

    Some doubts on relativity

    Sorry!!, it must be: - a-age > c-age > b-age ? - b-age > c-age > a-age ? or - c-age > a-age = b-age ? I have edit it in the other one! So, What's the information we need? What are the details? If we can't know this, that means that we can't know the kinetik energy, either... not...
  9. nucleartear

    Some doubts on relativity

    I'm agree with you!! But I don't trying to say they move instantaneously! Thanx anyway!! We have theese three galaxies, A, B and C, where A and B is moving at the same velocity at the C reference... So: - If we are at A, B is moving, so the time at B goes slower than at A. - If we are...
  10. nucleartear

    Some doubts on relativity

    I understand what u say! but seems like we still have a problem: If those three people were born at the same moment at the same place (call it D), equidistant from A, B and C, and each one goes to each galaxy at the same moment (moment at D), and some time after, they come back to D at the...
  11. nucleartear

    Some doubts on relativity

    Sorry if this doubt has been posted anytime before, but in a little view I have not seen it! (well, I have not make an exhaustive search, it could take long time!). I think this doubt must be easy to resolve: So, we have two galaxies, A and B, and they are moving... If we are at A, we can say...
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