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Southtown

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  1. Like
    Southtown reacted to coldcreation in Favorite Quotes   
    Plunge boldly into the thick of life, and seize it where you will, it is always interesting.
    ~Johann Wolfgang von Goethe
  2. Like
    Southtown reacted to Turtle in Favorite Quotes   
    when something moves, nothing gets out of its way. ~roger thelonious george
  3. Downvote
    Southtown got a reaction from Moontanman in Hydroplate Theory   
    http://news.discovery.com/earth/new-mexico-stretching-120118.html
     
    New Mexico is expanding. Hydroplate would call that "rebound."
     
    The "where did the water go?" question is answered by Hydroplate as "the land rose above it."
     
    ...by contraction of the previously unfragmented continental layer.
     
    Rebound...
  4. Downvote
    Southtown got a reaction from Turtle in Hydroplate Theory   
    http://news.discovery.com/earth/new-mexico-stretching-120118.html
     
    New Mexico is expanding. Hydroplate would call that "rebound."
     
    The "where did the water go?" question is answered by Hydroplate as "the land rose above it."
     
    ...by contraction of the previously unfragmented continental layer.
     
    Rebound...
  5. Downvote
    Southtown got a reaction from JMJones0424 in The scientific method   
    It is inanimate. A toy to be manipulated in anyway that the weilder sees fit.
     
    The only way to be objective is to make ourselves be objective. The behavior of others is out of our control.
  6. Like
    Southtown reacted to lawcat in Charge   
    Firstly, it important to begin the discussion by understanding that your very question goes against the prevailing view of what charge is.
    The prevailing view is that charge is a fundamental property of some particles.
    Your question presumes that something causes charge, which would make charge not fundamental in particles, but would make something else in particles fundamental so that charge is exhibited as an effect under certain conditions.
  7. Like
    Southtown reacted to lawcat in Differential Capacitor Equation   
    I don't use mathlab symbols but I'll try to explain it anyway.
     
    The cap is charged and shorted, meaning you have no source in the circuit other than the capacitor voltage. When you short the capacitor's leads, all you have in the circuit is the capacitor and the resistor in series. The capacitor discharges current through the resistor.
     
    Using Kirchoff's current law at the node between the cap and R, the current from cap "into" node (+) = current "leaving" the node (-). The current from capacitor is I=CdV/dt. Current into resistor is V/R. So the formula is:
     
    CdV/dt = - V/R; or CdV/dt + V/R = 0. Or rearranged:
     
    dV/dT + (1/RC)V = 0.
     
    This is first order linear diff using "e ^ Integral of p(t)dt" where p(t)dt = 1/CR to multiply both sides with.
     
    (e^Integral(1/RC)dt)dV/dT = 0
     
    Now to get V you integrate both side, keeping in mind that where the 0 is, that is where the initial condition is imposed of the voltage at 25 V. So when you integrate 0 on the right you will ebe left with 25 V. So after integration on both sides with respect to t:
     
    (e^t/RC)(V(t))=25 V
     
    or
     
    V(t)=25V x e^-t/RC
     
    plug and chug.
  8. Like
    Southtown reacted to CraigD in Post Big Bang Time   
    First, no matter where and when you are, your perception of a “nearby” clock nearly at rest relative to you is the usual one: about 1 sec/sec (or, generally, 1 any time unit/1 the same time unit). It’s only when you’re observing a clock that’s moving relative to you, or is much closer of further than you from a large mass, that you’ll see that clock disagree with a nearby stationary one. What “perception of a clock” really means here is “comparison of the reading of a clock to that of a nearby, stationary clock.”
     
    What I think you’re asking here, Deepwater, is what would a clock inside the young, rapidly expanding universe, look like to an observer outside of that universe. Though hard to imagine, and fraught with difficulties such as how the light/sight of the clock would get to the observer, how a clock could exist in the early universe where even the fundamental particles, let alone the matter needed for a clock, didn’t yet exist in a usable state, and whether the space the observer is in should be considered to be expanding like that of within the orange-size universe, the answer would be, I think, that the clock would appear to be nearly unchanging. The reason for this answer breaks down into 3 parts:
    velocity time dilation – not much effect due to this, as despite the clock “moving” along with the expanding universe, it wouldn’t be moving relative to the space it and the observer are in. This is a profoundly weird idea: points in the inflating universe aren’t moving away from one another, the space in which they’re contained is getting bigger.
    gravitational time dilation – assuming gravity exists at this point – by no means a given – the clock in the small universe would be very “low” compared to the observer, so would exhibit a lot of this kind of time dilation.
    redshift due to the expansion of space – light showing the first (and only – the orange-size universe exists only for a very brief instant) “ticks” of the clock are stretched/redshifted by a gigantic factor. So the tick – which must be much shorter than any real clock can produce, less than 10-32 s – would appear to us to be as long as the time it takes to cross the post-expansion universe, about 100,000,000 years.

    (For more, see the wikipedia articles time dilation, metric expansion of space and redshift)
     
    As I outlined above, the answer is exactly the opposite: time would seem to speed up as cosmic inflation stops – though inflation doesn’t appear to be stopping, but after slowing by a gigantic factor about 10-32 after starting, to be increasing at an ever-increasing rate. The “drinking cup” graphic at its above linked wikipedia article diagrams this nicely.
     
    First, best-accepted theory and data contradict the assertion that the expansion of space will ever stop and reverse – head toward what’s traditionally termed “the Big Crunch”.
     
    That said, we need to think a bit about what “time running forward” or “backwards” means, and why we could say we “know the reason” it runs forward. Condensing a lot of thinking into a few words, “time running forward” means, and we “know the reason” why it does because things get more disorganized – a cup dropped on the floor become disorderly fragments of broken cup more often than fragments dropped on the floor reassemble into an unbroken cup. The terms “disorganized” and “disorderly” in this context are part of the physics concept of entropy, but that word has so much non-scientific baggage, I prefer to stick with these ordinary language terms.
     
    So time running backwards would be a state where things gets more organized – cups form from broken pieces, stars suck up light and heat, split helium into hydrogen, then balloon into protostellar nebulae, etc.
     
    Physics doesn’t predict this happening. Even if it did, it’s hard to conceive of how any human could experience it, as how we experience things. Our senses, perception, consciousness, reason, and memory, are due to stuff happening in our brain and other organs analogous to breaking cups and shining stars. Though intuition leads us to think disorder is bad, and life and thought decreases it, in physically exactly the opposite is true – life increases the total disorder of the universe, and information equates to disorder.
  9. Like
    Southtown reacted to modest in What are you listening to right now?   
    :singer: I blame it on my a.d.d. baby... SAIL :singer:
     
    cant help but turning this one up and belting the lyrics out every time I hear it
     

     
    ~modest
  10. Like
    Southtown reacted to theblackalchemist in What are you listening to right now?   
    When the Wind Blows
    http://www.youtube.com/watch?v=H8iY1ITW0So
     
     
     
     
    & Coming home
     
    http://www.youtube.com/watch?v=xKva6v4Lxr8
     
     
    Album: The Final Frontier
    Artist: Iron Maiden
  11. Like
    Southtown got a reaction from sanctus in What are you listening to right now?   
    Welcome to hypography! =)
     
    http://www.youtube.com/watch?v=YgSADIQSbpQ&feature=related
  12. Like
    Southtown reacted to modest in Is the universe infinite?   
    It looks like you're screaming about it. All caps are usually taken as shouting.
     
     
    The second sentence seems to contradict the first.
     
     
    I don't see how it's related to the topic. Maddog's point is valid. Empty space, according to quantum field theory, is never truly empty. It has a vacuum expectation value. If this is unsatisfying then you might ponder a quote from Einstein on the subject, "People before me believed that if all the matter in the universe were removed, only space and time would exist. My theory proves that space and time would disappear along with matter." But, I really don't see how it's related to the topic.
     
    ~modest
  13. Like
    Southtown reacted to modest in Is the universe infinite?   
    Certainly, if the universe is spatially infinite then the 999 trillion lightyears sphere is vanishingly small in comparison. The question, however, is if the universe is infinite.
     
    General relativity tells us that there is a critical density, [math]\Omega[/math] beyond which the universe is closed like a four dimensional sphere. We can measure the curvature by measuring the density of space. Measurements tell us that the universe is very nearly flat (Omega is very nearly equal to unity). However, measurements are not yet accurate enough to know if Omega is exactly equal to one or slightly more or less.
     
    If Omega is slightly more than one (let's say 1.01) then the radius of curvature will be about 140 billion lightyears (a circumference of about 800 billion lighyears). The universe will not be infinite and the sphere of r = 999 trillion lightyears would be larger than the universe.
     
    You can read how the shape of the universe is related to its size here: Shape of the Universe -- Global Geometry
  14. Like
    Southtown reacted to Vox in Is Dark Energy expanding our bodies?   
    "If you understand, things are just as they are; if you do not understand, things are just as they are."
     
    Zen Quote
  15. Downvote
    Southtown got a reaction from Moontanman in Hydroplate Theory   
    So you're claiming that the salinity would be completely equalized across the globe in about 12 months?
     
    wtf is this about?
     
    "Description
    Information on the Baja California legless lizard is currently being researched and written and will appear here shortly.
    Authentication
    This information is awaiting authentication by a species expert, and will be updated as soon as possible."
     
    Asteroid ice may be 'living fossil' with clues to oceans' origins
    Life must have targeted earth from the frozen peripheries (as opposed to being ejected.) Nevermind the evolutionary spectrum of 'quasi'-life on neighboring planets predicted by selection.
     
    You're smarter than this, man. This is Hypography; if you can't back it up...
     
    I would hope that the material covered would include sources also, considering how much the ****ing courses cost...
  16. Like
    Southtown got a reaction from DougF in Climategate   
    Sounds a lot like "she hit me first..."
  17. Like
    Southtown reacted to modest in Expanding Universe   
    Happy New Year :xparty:
     
     
    I agree
     
    I hadn't thought of that, but now that you mention it I think it would be the best, and certainly most readily available, means of finding a cosmic time.
     
    It would be interesting, and I'm trying to figure out how, to convert between years and CMB temp...
     
    ... :confused: ...
     
    Ok, the best I could find is equation 66 here. It relates temperature to redshift as,


    [math]T_0 = \frac{T_1}{1+z}[/math]
    this would be the same as,


    [math]T_{CMB} = 2.728(1+z)[/math]
    which makes sense because 1+z is the ratio of scale factors which is the factor by which radiation is stretched. Except for small redshift, the only way I know to accurately solve z as a function of time is with a cosmology calculator where "light travel time" on the calculator is "years ago" in the table below and the resulting redshift is added to one and multiplied by 2.728 to give CMB time. So, I guess I'll see what time 'significant' things happened in our expanding universe by our cosmic clock...
     
    all values very approximate,
     

    [font="Courier New"] Event Years Ago Redshift CMB Time -------------------- --------- -------- --------- First Civilization -> 10000 0.000 2.728 K Lucy ---------------> 3.2 Myrs 0.000 2.728 K (Australopithecus) Was Born Dinosaurs Died -----> 65 Myrs 0.005 2.742 K First Large --------> 0.5 Gyr 0.037 2.829 K Animals Fossilize Solar System--------> 4.5 Gyr 0.431 3.904 K Formed First Galaxies------> 13.2 Gyr 10.253 30.698 K Formed? CMBR Formed---------> 13.6 Gyr 1500 4000 K [/font]
     
    What's fun is that the clock is ticking down towards zero—the heat death of the universe—a kind of cosmic how-much-useful-time-do-you-have-left clock :hihi:
     
    ~modest (across the pond, 2.726 ± 0.01 K -- 5:19 pm and counting down...)
  18. Like
    Southtown reacted to lawcat in The Theory of Eventuality   
    Well, there is an exception. I can fully describe the bottle on my table without knowing anything about is birth or death. I can fully describe my hair without knowing its birth or death. I can fully describe assets, liabilities and profits of a company without knowing its birth or death. Snapshots in time describe things fully without any need for knowing birth or death.
    Conversely, I may not know anything about something if I only have information about its birth or death.
    Now, if you want to say: no life can be fully described withoutif not described in terms of birth and death; then I may agree.
     
    If theory of eventuality is a theory of events, and if events are durations, and if durations describe life, and if life must contain birth and death, then eventuality rests on birth and death.
  19. Like
    Southtown reacted to snoopdogg in The Theory of Eventuality   
    It’s not perspective your searching for, it is perception. Energy, Space and Time, do not co-exist or interact with each other, they are all simply the same thing. Perspective comes from viewing things from different origins; however perception is the ability to view things all together.
  20. Like
    Southtown reacted to Tormod in Who can supply this   
    We do supply snake oil, though.
  21. Like
    Southtown reacted to Essay in Climategate   
    At the risk of stating the obvious ...again....
     
    In the same way that you confuse temperature with climate:
     
    ===
     
    So now, in the same way, you confuse "scientific fact" with research.
     
    If you don't think research depends on desperately sparce funding, you've never worked in research (except pharmaceutical or petroleum research, I suppose). :doh:
     
    ~ :naughty:
     
    p.s. ...or never tried to fund some grand global-scale experiment to test CO2.
  22. Like
    Southtown reacted to pamela in Favorite Quotes   
    Piece on earth, good will hunting men;)
  23. Like
    Southtown reacted to Boerseun in Favorite Quotes   
    When an evil dog and a good dog fight, the ultimate winner will be the one that is fed the most.
  24. Like
    Southtown reacted to lemit in Expanding Universe   
    If I remember right, that's one of the quirky little things General Relativity addresses.
     
    It's kind of like having to hold on because the earth is spinning so fast.
     
    --lemit
  25. Like
    Southtown reacted to Moontanman in Best Website Ever!!! :)   
    Best? I didn't see any nekked girls :)
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