Recent content by CleffedUp

  1. C

    Variances of Physics on Earth

    Variances of "Physics" on Earth This is a question on the dynamic nature of the human experience of physics on Earth. The Earth orbits the Sun, the Sun and our solar system are moving in some sense (at least with respect to the expansion of the universe), and the entire universe is acting...
  2. C

    Synthesizing Element 117: Practical Applications of a Potential Element 126

    Probability that Z=117 becomes Ignobelum is now > 0. My greatest contribution to science to-date (I'm getting there!).
  3. C

    How can I design a survey to study word associations with birds?

    Hi all, I was wondering if you social science types have a particular canon or other good reference for sound survey design, i.e. minimizing confounding factors. Good sources on experimental design, in general, are also welcome. I'd rather learn to fish than just have takeout, but the survey...
  4. C

    What do 'nerdy' guys like in girls?

    Herein lies the answer. Nerds are people too, with varied tastes, but the common denominator is the ability to be so fiercely absorbed in something else as to completely overlook the subtle nuances of human interaction. Don't wink, don't flirt, don't plan to be in the right place at the right...
  5. C

    What makes an oxidation state common?

    This isn't a homework question, but seemed sufficiently low-level that it belonged in this part of the forum. When one speaks of "common" oxidation states, what is meant by "common?" Is this simply to say the states most commonly occurring in nature? This would be opposed to most commonly...
  6. C

    Isotopic mass, or maybe just a silly math question

    ...binding implies "slower," and m = e/c^2, so m is lower! Makes sense. Thanks CT. I'll go off and Google for a deeper understanding.
  7. C

    Determining the amount of Silica in Water

    Interesting. Any suggestions for further reading? Google terms other than "aqueous silica solution"?
  8. C

    Determining the amount of Silica in Water

    I'm not sure this meets your requirements, but it seems to me that if you know the densities of silica and water you should be able to figure out the concentration of a solution to a reasonable precision with a cylinder, a scale, and a calculator.
  9. C

    Isotopic mass, or maybe just a silly math question

    One postscript: One thing I still don't understand though is why I couldn't come to this answer by multiplying amu by the particle values, e.g. Br-81 = 35p * 1.0073 + 46n * 1.0087 + 35e * 0.0005 = 81.6732 != 80.92
  10. C

    Isotopic mass, or maybe just a silly math question

    First off, thanks for all the replies. All that was given is listed under the question, and the textbook answer is the precise mass of the other isotope, so plugging in 81 as y doesn't cut it. If you do the algebra, you get 78.84, which does tell you the other is probably Br-79, but this...
  11. C

    Isotopic mass, or maybe just a silly math question

    Homework Statement The atomic weight of bromine is 79.904. The natural abundance of Br-81 is 49.31%. What is the atomic weight of the only other natural isotope of bromine? Z = 35 Homework Equations The answer is 78.92 amu (Br-79) and Br-81 happens to be 80.92 amu. The Attempt at...
  12. C

    Watch LHC Launch Tonight on TV in US with FTA Dish

    Sure the most exciting early milestone will be the first collision, but it's still a milestone. The opening pitch of a baseball game doesn't usually mean much, but spectators cheer it just the same, excited about what's to come. This is also the first opportunity to learn more about the...
  13. C

    Watch LHC Launch Tonight on TV in US with FTA Dish

    I found another feed on an Irish news site: http://www.rte.ie/live/ They have some well-informed commentators, which is probably an upgrade over the raw CERN feed. They explain the monitors and you get into the workings of the devices at a useful level of detail. This is CSPAN-esque, but...
  14. C

    When Will We See Results from the Large Hadron Collider's Latest Experiments?

    Is this site legit? I haven't been able to find public dates for anything, and this site doesn't seem even remotely affiliated with CERN. For all the significance of the LHC, there seems to be a severe lack of public information about what's actually going on, especially this late in the game.
Back
Top