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| Tags: circular, dilatation, motion, time |
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#71
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Dear El Enrrabadore-mor:
On May 5, 9:19*am, "El Enrrabadore-mor" wrote: "N:dlzcD:aol T:com (dlzc)" escreveu na .. . ... How can the above two pillar stones of Physics survive in view of time dilatation (and time not being absolute after all)? Because "absolute" is something artificially impressed by *human* expectation. Unfortunately for you, you cannot solve any Physical problem without that "absolute fixed frame of reference". I do it all the time. "substitution of variables", "selecting a coordinate frame", everything starts with "the difference between here and there". You simply cannot solve problems in thin air. You need a paper for that, where you place an absolute fixed frame of reference. It is not absolute. It is "bond". David A. Smith |
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#72
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On May 5, 9:58 am, "El Enrrabadore-mor"
wrote: "Ken S. Tucker" escreveu na ... Use h = energy*time, = E*t = E'*t' then E' = (t/t')*E, Fortunately "h" is a universal constant and invariant. Two different observers can disagree on the measurement of E and E', and t and t', but they agree on the product "h". It is good to know that observers can agree on something. You've made some good points Ken. Regards. Thanks, you can do a lot of relativity with easy algebra. Calculus applications in relativity has the experts stumped, in view of QT. Best to learn using increments in place of differentials, and understand it well. You pretty much need to have a good Master standing in Math & Physics to know how fast things can go wrong applying calculus to relativity. Regards Ken S. Tucker |
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#73
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"Dono" escreveu na mensagem ... No, it isn't. This means that you are both an imbecile and a troll. No pictures then? Arguments are something that is strange to you, as predicted by everybody's large experience. That's great because Sagnac is so boring. |
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#74
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"dlzc" escreveu na mensagem ... Dear El Enrrabadore-mor: On May 5, 9:19 am, "El Enrrabadore-mor" wrote: "N:dlzcD:aol T:com (dlzc)" escreveu na ... Dear Greg Neill: "Greg Neill" wrote in message om... ... No, in a propagating transverse electromagnetic wave may be orthogonal, but they are in phase. In a vacuum they are in phase. As a medium in interposed, the phase relationship changes. When bound to a conductor, and "pushing" charges around, they are 90 degrees out-of-phase. From my knowledge on power generation, the electric and magnetic fields are 90 degrees out-of-phase if no mechanical energy is converted into electric power. That is what pushing electrons (with their mass... remember simple harmonic motion?) does. When you are pushing electrons, like if it were an harmonic motion, you are pushing reactive power only, back and forth, without any energy loss, nor any energy converted. It's harmonic motion of a system at its natural frequency. It's a coil+capacitor set up (zero resistance). It's a motor without rotor. To really push electrons out of the system and generate net electricity (real power on a resistor P = R I^2 for instance) you must move towards a situation where the electric and magnetic fields become in-phase. Only in-phase you got zero reactive power and 100% real power converted. |
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#75
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"El Enrrabadore-mor" wrote in message
"dlzc" escreveu na mensagem ... Dear El Enrrabadore-mor: On May 5, 9:19 am, "El Enrrabadore-mor" wrote: "N:dlzcD:aol T:com (dlzc)" escreveu na ... Dear Greg Neill: "Greg Neill" wrote in message m... ... No, in a propagating transverse electromagnetic wave may be orthogonal, but they are in phase. In a vacuum they are in phase. As a medium in interposed, the phase relationship changes. When bound to a conductor, and "pushing" charges around, they are 90 degrees out-of-phase. From my knowledge on power generation, the electric and magnetic fields are 90 degrees out-of-phase if no mechanical energy is converted into electric power. That is what pushing electrons (with their mass... remember simple harmonic motion?) does. When you are pushing electrons, like if it were an harmonic motion, you are pushing reactive power only, back and forth, without any energy loss, nor any energy converted. It's harmonic motion of a system at its natural frequency. It's a coil+capacitor set up (zero resistance). It's a motor without rotor. This is true only if you consider full cycles at a time. Or are you arguing that electrons don't move at all when voltageis applied to an inductor? If so, from whence comes the electromagnetic field that couples the coils of a transformer? For a pendulum given an initial displacement, are you arguing that no work is done in the gravitational field as the bob falls and then the same energy is transformed back to potential energy as it subsequently rises again? To really push electrons out of the system and generate net electricity (real power on a resistor P = R I^2 for instance) you must move towards a situation where the electric and magnetic fields become in-phase. Only in-phase you got zero reactive power and 100% real power converted. Methinks you're hung up on electrical impedance. |
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#76
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"dlzc" escreveu na mensagem ... Dear El Enrrabadore-mor: On May 5, 9:19 am, "El Enrrabadore-mor" wrote: "N:dlzcD:aol T:com (dlzc)" escreveu na .. . ... How can the above two pillar stones of Physics survive in view of time dilatation (and time not being absolute after all)? Because "absolute" is something artificially impressed by *human* expectation. Unfortunately for you, you cannot solve any Physical problem without that "absolute fixed frame of reference". I do it all the time. "substitution of variables", "selecting a coordinate frame", everything starts with "the difference between here and there". In theory that's fine. In practice you're bond by the experimental set up, made here on Earth, or nearby. Put the theory written on paper aside. Look only for real world experiments. If you're in trouble to find where the absolute frame of reference is, call me and I'll tell you. You simply cannot solve problems in thin air. You need a paper for that, where you place an absolute fixed frame of reference. It is not absolute. It is "bond". Whatever. You always need a background frame of reference and that same frame is assumed to be something that carries absoluteness. David A. Smith |
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#77
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"El Enrrabadore-mor" wrote in message
Whatever. You always need a background frame of reference and that same frame is assumed to be something that carries absoluteness. Silly. There's nothing absolute about the common inertial frame; one's as good as another as far as the physics is concerned. Nothing absolute about it! |
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#78
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On May 5, 12:51 pm, "El Enrrabadore-mor"
wrote: "Darwin123" escreveu na ... On May 4, 7:31 pm, "El Enrrabadore-mor" wrote: "Darwin123" escreveu na ... On May 3, 2:25 pm, "El Enrrabadore-mor" wrote: It is said that a speeding clock shows less elapsed time than the stay-at-home clock, because (if already speeding) it is ... You cannot add both effects: Velocity + Acceleration If you sum both effects chances are that you come up with the conclusion that they cancel each other out. That's what happens for a stable orbit anyway. N. The velocity and the acceleration don't cancel out in a stable orbit. Or rather, the statement is meaningless. I think what you are saying is that the centrifugal force and the gravitational force balance in a stable orbit. The centrifuagal force is one of the fictional forces that I referred to. The rate of ticking of a clock has nothing to do with the stability of the clocks orbit. If the ticking of the clock has sped up or slowed down relative to another clock, that does nothing to either the velocity or the acceleration. You reversed my statement. You seem to think that if the ticking of the clock changes, then its velocity and acceleration have to change. Not true. What I said was the opposite. No they don't. They don't exactly speed up. In fact, the acceleration at some point wins out over the effect of speed. Where did you get the impression they speed up? That's what you've said (your words below): "The clock with the largest acceleration ticks the fastest." And you keep saying it now, plenty of times, above and below. I was talking specifically about the Hefele-Keating experiment. In that experiment, the ticking of three atomic clocks was compared. In that experiment, it happened to be that the fastest ticking clock had the largest acceleration. I am sorry to have confused you. I slipped into one very specific experiment, one where all factors were kept the same except the centripetal acceleration. I have to make a qualifier for direction of acceleration. When there are two clocks, and one accelerates, the accelerating clock increases its ticking compared to the unaccelerated clock by an amount proportional to the acceleration in the direction toward the unaccelerated clock. Now that I have included direction, there is of course the possibility of negative acceleration. I've a strong feeling they must balance out for a stable orbit. Stable orbits always balance centrifugal force with the force of gravity. "I've got a strong feeling" Is that the basis of your argument? I don't believe it. Whether the ticking of the clock speeds up or slows down can have nothing to do with the stability of the orbit. 1 - Absolute time? No such thing. I meant that for a perfect balance among a) and b). 2 - Partially absolute time? What is that? That's the case where a perfect balance doesn't exist. According to your above statements, that should be the most probable case. Sorry. I never heard or read the statement, "partially absolute time." The meaning was not self evident. The statement looked self- contradictory, and I could not make a connection between anything I (or Einstein, or Lorentz, or anyone) said and the phrase. It was clear in your own head, I am sure. Read it again and consider how someone else would interpret it. 3 - Discard one of the effects and have relativity time dilatation solution? Yes. Discard the acceleration and you have the Lorentz time dilation formula. Now I'm puzzled. You've been talking about accelerations all the time. Now you discard acceleration and step forward? I am puzzled that you are puzzled. You seem to know something about the Lorentz time dilation formula. The larger the magnitude of the relative velocity, the slower the ticking of one clock relative to the other. This is one effect, as I thought I made clear. The formula, as I thought I made clear, is not exactly true in the presence of acceleration. That is another effect, as I made clear. If there is both acceleration and velocity, one has to multiply the two factors. However, if the acceleration is zero the acceleration factor is one. The Lorentz dilation formula is then valid. I bet on conservation of energy, but I was already told that General Relativity essentially discards nonlocal conservation of energy. The same goes for Newton's Laws. An observer in an accelerating frame of reference, according to Principia, observes a fictional force that violates the Third Law of Motion. This fictional force creates a fictional potential energy that creates a fictional violation of the conservation of energy and momentum. Key qualifier here is fictional. Newton's Laws are defined only in nonaccelerating reference frames. Therefore, the accelerating observer sees a "fictional" increase in energy, nonlocally. That's an Invention without any bases. No such fictional force exists. I bet "your" fiction requires motion. No motion, zero work done. "No such fictional force exists." That is correct. By definition, a fictional force does not exist :-) You are confused. Centrifugal force is a frictional force. Look it up. Google "Centrifugal" and "fictional force". You should get lots of hits. Even outside of relativity. This is a well known Newtonian concept. The "centrifugal force" is fictional. Figure out what that means in Newtonian terms, and then go back to analyzing SR. Is it the centrifugal force you are talking about? That and some others. Learn about that one and then we can discuss the others. No one, ever, could prove Newton wrong, nor prove any violation of Energy Conservation. Again, please get to know Newton before you read Einstein. Really, Newton's theory is a bit deeper than what you claim. There is no excuse for saying "I have a feeling." You don't even know how Newton was right, so how could you claim he was never proven wrong? Potential fields are just that: A potential. No work will be done if no motion exists. But energy is the potential to do work. That is the definition. What do you think energy is? Potential energy is a general term for any energy not stored by the motion of the body (i.e., kinetic energy). You do know the difference between potential energy and kinetic energy? PreEinstein definitions, I mean. In GR, they replace the words "accelerating reference frame" by curve in "space-time path". Basically the same thing. The observer on the curved space time path sees "fictional" changes in energy. That should be another relativistic invention. The word "fictional" says it all. Google "centrifugal" and "fictional force" and "Newtonian". This is not a relativistic invention. Read "Principia." Read any physics book that is preEinstein. You need to explain this much better, so that I can understand what you're talking about. You can imagine whatever you want, the problem is to prove that imagination a true fact. That simply shots down a Physics pillar stone, but who cares? Bad metaphor. There was never a "physics pillar stone" like "nonlocal conservation of energy." See above comment on Newton's Laws and nonlocal conservation. I'm still to see a true violation of Newton's Law, or a violation on "Energy conservation". There is no "true violation." There is a violation as seen by the accelerating observer. His observations are not considered true. If you had an energy lost during acceleration, during de-acceleration you've reverted the sign. Mathematics and simple logic says you should see a gain in energy. The quantity called energy is observer dependent. This was well know even before Einstein. There is a type of energy called kinetic energy. An object moving has an energy due to the fact it is moving. If an observer decides to follow the object and match the objects speed, he has changed the objects kinetic energy to zero. Got that? Observer 1 is moving relative to the object and sees 100 Joules of kinetic energy. Observer 2 matches the velocity of the object and sees 0 Joules of kinetic energy. The object hasn't changed. The only thing that changed is the observer. This has NOTHING to do with SR. This is a well know effect in both Newtonian and Einsteinian physics. Your problem is that you don't know ANY physics, including Newtonian. Learn Newtonian physics and get back to me. Please respond. |
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#79
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"Darwin123" escreveu na mensagem ... Your problem is that you don't know ANY physics, including Newtonian. Learn Newtonian physics and get back to me. OK, Darwin, I promise I will study Newton one day. I'm only 17 Years old, you know... I'm a liar too. When I grown up I'm going to be a relativistic rocket ship constructor, you know? Thanks for explaining me Physics, specially that centrifugal force doesn't exist. I'm going to pick my friend motorcycle (100CV) and I'm going to make the coffee turn (a 90 degrees curve) at 250 Km/h. No problem, it doesn't exist. |
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#80
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On May 5, 8:10 pm, "El Enrrabadore-mor"
wrote: "Darwin123" escreveu na ... Your problem is that you don't know ANY physics, including Newtonian. Learn Newtonian physics and get back to me. OK, Darwin, I promise I will study Newton one day. I'm only 17 Years old, you know... I'm a liar too. When I grown up I'm going to be a relativistic rocket ship constructor, you know? Thanks for explaining me Physics, specially that centrifugal force doesn't exist. I'm going to pick my friend motorcycle (100CV) and I'm going to make the coffee turn (a 90 degrees curve) at 250 Km/h. No problem, it doesn't exist. Make sure you have enough centripetal force, though. Centripetal force does exist. If you don't have enough centripetal force, you won't make that coffee turn. You will go in a straight line which will intersect a wall. Then you will be dead. So make sure about that centripetal force. |
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