Recent content by queenofbabes

  1. Q

    Support PF: Buy on Amazon.com from here

    Wow, never knew about this until the mass email about the login issues. ...and I just bought ~$200 of books from amazon 2 weeks back. Dang.
  2. Q

    Mathematica Solve large equation (Mathematica)

    Perhaps nice compact solutions simply don't exist if your expressions are too complicated. Do you really require an algebraic expression? If not, plug in your expressions for w and v, then use Solve/NSolve.
  3. Q

    Number of C-14 atoms in old piece of wood

    Well....*technically* N(t1) = N_0 * e^{-\lambda*t1} , so you shouldn't have cancelled out the N0, although it does not affect your final answer.
  4. Q

    Organic cis- tran- structure

    We use the terms cis-but-2-ene (best be clear where the double bond is) and trans-but-2-ene in my chem classes, so I think they're fine.
  5. Q

    Classical or quantum electromagnetic theory?

    In no way does the classical theory imply that the statement is false. As said above, quantum and classical theory do not disagree on the definition of the word "intensity".
  6. Q

    Simple Electrostatics Lab: Clarification

    Hm, maybe the discharging effect of you touching it is not that significant after all...>.<
  7. Q

    Simple Electrostatics Lab: Clarification

    You have to charge both combs separately, then bring them together to see if they attract or repel.
  8. Q

    Simple Electrostatics Lab: Clarification

    Both the object and the comb will be charged. What you really want is the comb to be charged, not the objects!
  9. Q

    Electric Field Zero where?

    They're really pretty much the same thing isn't it? If L is unknown you will have to give your answer in terms of L anyway.
  10. Q

    Simple Electrostatics Lab: Clarification

    That's because you shouldn't be touching the charged comb. If you do, you'll act as an earth and the comb will be discharged. As for the other materials, it's for you to try and find out =D
  11. Q

    One dimensional motion problems

    1) Can you find the displacement (with respect to the flagpole) of each runner at any given time? When they meet, what must their displacement be? 2) How long does it take for the train to stop with the given acceleration? Thus how far would it have travelled?
  12. Q

    Simple Electrostatics Lab: Clarification

    The purpose of the second comb is to find out the polarity of the charges! You have no way of knowing if you're using just a single comb. You shouldn't expect to find them charged in their natural state.
  13. Q

    Electric Field Zero where?

    Yes, it should be wanting 2.90.
  14. Q

    Electric Field Zero where?

    What are the coordinates of q1 and q2? Therefore what is the coordinate of the point with zero E field?
  15. Q

    Electric Field Zero where?

    You ought to count from the origin...
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