Recent content by Daniel Bolden

  1. Daniel Bolden

    Is there a terminal velocity upwards?

    yes. terminal velocity is when a driving force is in equilibrium with the drag force. the faster an abject goes in the atmosphere, the more air resistance it experiences. if the rocket engine can only reach a certain thrust, the air resistance may push back at the same thrust preventing...
  2. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    I apologize once again. A was supposed to be matrix A, describing anything you want about the whereabouts and state of the particle near position x. Matrices are usually not dismissed as irrelevant describing particles in space and time. OK, stopping the clock...i was referring to taking a slice...
  3. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    I re-read the question...but my stance is constant : A + 0 = A. it depends on position of particle mentioned when clock was stopped. no real particle is at any position for zero units of time, even if moving at relativistic speeds. even a photon is measured by its wavelength. therefore when...
  4. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    you have been at zero positions if you have spent zero time anywhere. if a particle has passed through a gas cylinder for 2 thousandths of a second, then it has spent 2 thousandths of a second passing through positions.
  5. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    my apologies. that was a bit of reaching. you caught that fast.
  6. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    if the particle was nudging its way up to x...almost there I've re-read the question. It seems to be saying the particle was moving in field Y for some time then passed onto field X for zero seconds. It never arrived into field X or position x. same as saying I drank zero cups of coffee this...
  7. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    i was just quoting wiki. i was implying that i believe, that the particle would at least exists in some form. though it may not be observable , or measurable, nor its state understood. but a zero interval = no change. matrix A + zero matrix = matrix A. but there are a lot of great responses on...
  8. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    ok i got you're meaning. well said. i thought of another answer more on the math side. take matrix A, then add a zero matrix. the resulting matrix = matrix A.
  9. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    that's the reason i was saying, since histories aren't deleted, then something existed, though we humans may have no clear definition of what that something is.
  10. Daniel Bolden

    If a particle was at position X for zero time, was it there?

    take the particle sitting or moving through x, now get out your stopwatch. and as the particle gets to, through...or stays at x, measure zero time elapsed. yes, the particle was at x. however, the smallest measurement of time that has any meaning, and is equal to 10-43 seconds. No smaller...
  11. Daniel Bolden

    Suggested Classical Field Theory texts?

    Sean Carroll's 'Spacetime and Geometry' Chapter 1 section 1.10 Classical Field Theory page 37 pretty much gets right to the point of explaining fields very clearly
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