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    Will the fusion reactor ITER decrease entropy?

    ITER is the fusion reactor in southern France that hopefully will come online in 2018. According to wiki http://en.wikipedia.org/wiki/ITER The ITER fusion reactor itself has been designed to produce 500 megawatts of output power for 50 megawatts of input power. Does this mean that if...
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    Virtual photons

    This is from Hogdson's book the Mind Matters Does anyone know what the actual equation he is talking about and I was wondering if anyone could give me a few more details regarding the energy-time uncertainly relationship.
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    Why quantum effects disappear at the classical level

    But the duck's answer looks so obvious and easy to understand. I guess liquid helium and bucking balls are anamolies, right?
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    Why quantum effects disappear at the classical level

    Thanks for that info, I didn't know that. Does decoherence require the many world interpretation?
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    Why quantum effects disappear at the classical level

    I forget where I read it but one author said that mountains of ink have been spilled debating why quantum effects disappear at the quantum level. I don't understand why this is a problem, I think the answer is rather obvious. One poster on another thread wrote: "Technically - classical physics...
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    You can't do operations on infinity

    ok, looks like I didn't know what I was talking about. Thanks for clearing things up.
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    You can't do operations on infinity

    I'm trying to get my words right. They say you can't do operations on infinity. Sorry I don't have an exact quote. But on the other hand you can do calculations involving infinite series. What is the proper way to describe what math can't do with infinity? I want to say something along...
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    Should the speed of light be slightly uncertain?

    Thanks. I appreciate your help.
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    Should the speed of light be slightly uncertain?

    Never mind, I give up
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    Should the speed of light be slightly uncertain?

    I read it before you advised me to read it of course and I still don't understand what you're getting at. If what you're getting at is the speed of light is relative to the observer, well, I already know that but I still don't see why it's speed cannot be uncertain.
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    Should the speed of light be slightly uncertain?

    Don't know what you mean by integer. Also didn't understand why you wanted me to read the wiki article on meter.
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    Should the speed of light be slightly uncertain?

    The position and momentum of a photon is uncertain. If that is the case, then shouldn't the speed of light be slight uncertain?
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    Understanding the Copenhagen Interpretation

    This is some other guys interpretation whom I don't really trust. So if you find anything wrong with it I would appreciate it
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    Understanding the Copenhagen Interpretation

    What about in the double-slit experiment and a detector is placed over the two slits? I think a particle is sent down from the detector which records which slit the particle went through. Isn't that a sort of measurement? Thanks for your help.
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    Understanding the Copenhagen Interpretation

    This is from Wikipedia regarding the first point of the Copenhagen Interpretation: What does it mean to make a measurement? Is this something that only living beings do or can a dead particle make a measurement? Why does measurement collapse the wave function.
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    Delayed choice quantum eraser

    Still hoping for an answer to this.
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    Delayed choice quantum eraser

    I want to get a second opinion on what this guy is saying, the words in bold. A third and fourth opinion would be nice. The detector destroys the interference pattern. The eraser restores it. Natural laws don't do anything. The detector is made up of charged particles. Charged particles...
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    Delayed choice quantum eraser

    How accurate is this statement: After the photon passes through the detector, it then passes through the eraser. The eraser is an electronic device that alters the wave-function of the photon, just like the detector is an electronic device that alters the wave-function of the photon. This guy...
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    HUP and Conservation of momentum

    You're just begging the question. You need to prove that I've committed a fallacy.
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    HUP and Conservation of momentum

    Your analogy is flawed. You're committing the fallacy of division http://en.wikipedia.org/wiki/Fallacy_of_division You're assuming that because a group obeys a law that its parts obeys a law. Imagine that you only had the ability to measure the strength of 3 billion humans. Given the...
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    HUP and Conservation of momentum

    Actually I got this quote from Kurdt posted 7 years ago in this forum at this thread: https://www.physicsforums.com/showthread.php?t=120224 I remember the analogy that you can borrow a loan from a bank on Friday so long as you return it on Monday when no one is looking. I'm still not...
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    HUP and Conservation of momentum

    I'm not talking about infinite precision. The Planck Length is 10^-35 m. I'm pretty sure quantum effects occur between 10^-15 and 10^-35 m since as I recall a proton's position and momentum can be known simultaneously but an electron cannot and a proton is 10^-15 m if I have my numbers...
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    HUP and Conservation of momentum

    Arbitrary precision isn't good enough. Say that momentum is between 3 and 5 at time t1, then between 3 and 5 at time t2 - how do you know it's conserved? It could be 3 at time t1 and 5 at time t2? My point exactly. If physicists can't know what x then how do they know x is conserved?
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    HUP and Conservation of momentum

    I find it very hard to believe that we know momentum is conserved at the quantum level. Let P = position and M = momentum. 10am: P = (7,4) M = ? 11am: P = ? M = 4 (7,4) is an x,y coordinate. How am I supposed to be able to conclude that momentum of the particle above was conserved...
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    Force and Energy

    Ultimately however a student can read A and B and falsely conclude C. Of course under rare occasions the student can read D and find out that C is false, but those occasions take time and are rare. And of course it is also the case that a student will believe C and one expert will say that C...
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    Force and Energy

    If you feel like helping others is a waste of time, then why are you here?
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    HUP and Conservation of momentum

    The HUP says that I can not know the position and the momentum of a particle simultaneously, therefore, from time T1 to time T2 I cannot predict its position. How does this not violate the law of conservation of momentum? If you cannot know its position and momentum exactly that how do we know...
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    Force and Energy

    It is easier to rid yourself of false beliefs by posing questions to experts than it is to read books written by experts. Let me prove this logically. 1. Expert says A and B are true, therefore I believe A and B mean that C is true. 2. If C is false and an expert is present, the expert will...
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    Force and Energy

    Remember the phrase I think by Twain better to be a fool and keep silent than open your mouth and prove it. If you just read physics and never open your mouth you'll never find out if you're a fool. You can read something and understand it incorrectly. The only way to find out if you're wrong...
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    Force and Energy

    Well, is there any subatomic particle that is ever not moving? Isn't the property that we use to account for particles perpetual motion that they have energy? I realize of course that I could go back and study classical mechanics. You can always do that. But every day a student of physics...
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