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Everything posted by juanrga

  1. At what level/detail? Inorganic chemistry textbooks as Advanced Inorganic Chemistry F. Albert Cotton, Geoffrey Wilkinson already discuss magnetic properties.
  2. It is possible to explain the same motions without using the dark matter hypothesis using theories as MOND, TeVeS... In fact, it has been recently shown that dark matter model cannot explain recent observations http://www.bbc.co.uk/news/science-environment-12571965 http://blogs.nature.com/news/2011/02/post_73.html
  3. Yes quantum theory undermines determinism, but it has nothing to see with the uncertainty principle, but with the non-unitary evolution of the quantum state (vonNeuman postulate).
  4. Time is an evolution parameter, not an observable. Therefore there is not time operator in QM. Yes, in RQM one would try to treat time and space in the same footing, but since time is related to causality, it cannot be given by an operator. Precisely quantum field theory takes the contrary way, position is downgraded from observable to parameter and then both space and time are treated in the same footing.
  5. Electromagnetic 'force' carriers (aka photons) propagate at c. Take a look to Feynman diagrams in QED.
  6. Two fermions cannot occupy the same place at the same time because would require infinite energy. Think of the Coulomb energy for two electrons separated by a zero distance! The Pauli exclusion principle is another thing. The Pauli exclusion principle is a quantum mechanical principle that says that two fermions cannot be at the same quantum state simultaneously. For example, no two electrons in a single atom can have the same four quantum numbers; if n, l, and ml are the same, ms must be different such that the electrons have opposite spins.
  7. Yes, it takes some time. The time scale is given in dynamical models of collapse.
  8. Time is an evolution parameter. Take a look to http://en.wikipedia....vistic_dynamics to learn more about time. See the section "Invariant Evolution Parameter Concept" and specially the subsection 1.2, which gives our modern understanding of time beyond Einstein. That wiki page also corrects some claims in your post
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