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| Tags: circular, dilatation, motion, time |
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#151
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"Tom Roberts" escreveu na mensagem ... El Enrrabadore-mor wrote: "Tom Roberts" escreveu na mensagem t... For circular motion, |v(t)| is constant: \tau = sqrt(1-|v|^2/c2) (T2 - T1) I just didn't realise that you've simplified that much the problem. Look at the subject of this thread. "simplifying" to circular motion is what is being discussed. Such simplification makes your solution ridiculous, that's all. It's not "ridiculous", it is what this thread is about. I gave a general equation (in response to an inquiry), and then applied it to the subject of this thread. shrug If you find the thread subject (the original inquiry) ridiculous, I must say it is not, since it is just a limit case of a very real and possible situation. We have about 7 planets that have almost perfect circular orbits around the Sun. All of which have different speeds and different gravitational fields. One can build 7 atomic clocks and place one per each planet during, say, 10 Years. After 10 Years running at different rates, clocks can be brought back to Earth and its elapsed time compared. If time has to differ, relativity must be able to predict those differences. That's what the inquiry is all about. If you find the above example not feasible and real enough, and have a better one. Draw a straight line from the center of the Sun passing by the center of the Earth. such line will cross the Earth surface in two points, one closer to the Sun and another the Earth diameter long. Such two points will have a differential speed of around 3,000 km/h due to daily Earth rotation, plus a square term additional velocity due to the radius increase relative to the Sun. Also you can consider the GPS satellites that revolve, if I remember correctly, around a 24,000 km radius. For GPS satellites the speed difference is much larger. According to Your "relativity circular motion" theory one should measure daily, or in a matter of hours, changes in the clock rates. Actually, the accuracy of GPS system must show deviations along the day and in a matter of hours too. But they don't, because as I remember nobody accounted for the radius distance change relative to the Sun during Earth circular orbit. [...] To compare, or to say, that circular motion is the same thing as linear motion, sounds ridiculous to me. What is ridiculous is your "sound bite" approach to physics. Nowhere does anybody claim "circular motion is the same thing as linear motion". But when the formula in question depends only on |v|, and when one considers a constant |v| (which can apply to either linear or circular motion), then THE FORMULA gives THE SAME ANSWER for the two types of motion. This does not in any way imply the motions themselves are "the same". This is not limited to just linear and circular motion -- ANY motion with constant |v| obtains the same answer from this formula. Sounds fair enough, but things are not that simple. For starters, there are no massless particles. The equivalence principles simply removes the mass from the theory. Therefore, forces like centrifugal force, centripetal acceleration and gyroscopic momentum (Iw) have been conveniently removed. And what about the length? There's one thing I'm sure about circular motion. You cannot have time dilatation and length contraction at the same time for circular motion. You cannot say that a circle doesn't measure 6,28... radians anymore. You cannot say that for a speed equal to the speed of light the perimeter of the circle is zero. And so on... I'm about to say that, relative to the XXI Century, relativity theory is in its Stone Age. ...and people stoned with it. Obviously you do not understand it, so your opinion is irrelevant. This is not a matter if I understand or not (and I don't understand). This is a matter of describing the real world and a manner that must be in agreement with experiment/observation. Clearly that your description doesn't fit reality. Nevertheless, everybody is free to dream and it is said that dreams are very important for life. Dream on. Tom Roberts |
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#152
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Ken S. Tucker wrote:
In the quoted article Pauli writes, "the transverse Doppler effect and the time dilation produced by gravitation appear as two different modes of expressing the same fact". What do you think he means by that? That these are equal for the frequency shift measured at the center of the circle for light emitted from an object in circular motion: a) apply the Doppler formula of SR. b) compute the acceleration of the object, convert that to an equivalent gravitational potential, and compute the corresponding redshift. This is a very basic exercise given in every GR course. If you don't understand this, then you need to STUDY the basics. Tom Roberts |
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#153
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On May 10, 11:06 am, Tom Roberts wrote:
Ken S. Tucker wrote: In the quoted article Pauli writes, "the transverse Doppler effect and the time dilation produced by gravitation appear as two different modes of expressing the same fact". What do you think he means by that? That these are equal for the frequency shift measured at the center of the circle for light emitted from an object in circular motion: a) apply the Doppler formula of SR. b) compute the acceleration of the object, convert that to an equivalent gravitational potential, and compute the corresponding redshift. This is a very basic exercise given in every GR course. If you don't understand this, then you need to STUDY the basics. Tom Roberts Very good Tom! Now that I have provided you with these simple facts and formulae, you can now proceed to explain them to El. Incidentally my ref is, Pauli's "Theory of Relativity", pg 150, "53. Simple deductions from the principle of equivalence", have you ever read that book? Regards Ken S. Tucker |
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#154
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"El Enrrabadore-mor" wrote in message
"Greg Neill" escreveu na mensagem m... "El Enrrabadore-mor" wrote in message When |v(t)| is constant, it doesn't matter if it's circular motion or linear motion, you always got Lorentz equation. Indeed. What a pleasing result! Wouldn't it be more strange if, despite the obvious analogs between the mathematical physics of linear and circular motion (v ~ w, T ~ F, L ~ momentum, etc., and the functional forms of rotational and linear energy), that relativity would predict different forms for the time dilation effect? Since time dilatation is something that is very hard for me to accept, I will say that maybe. Imagine that the original inquiry about the circular motion is a 100 seconds-light radius motion around Saturn. People here on Earth will see that circular motion from an external point of view of the circle. It will be like looking to a spinning wheel and compare clock rates from the point of view of a fixed external observer. The symmetry of the problem simply cancels out any possible time dilatation. Therefore, we have the same circular motion problem and two different inertial observer (one at the center of the circle, the other an external observer) that disagree on time dilatation. Which one is right? Both. The Saturn-based observer sees the "ship" moving at a constant velocity in a circular orbit, and measures a constant time dilation a la Lorentz. The external observer, say he's in the plane of the cirular motion and at a fixed location with respect to its center, will also ascribe the same time dilation to the ship if he's careful to take into account the effect of light travel time on the measurements. To compare, or to say, that circular motion is the same thing as linear motion, sounds ridiculous to me. They are clearly not the same thing, as rotational and linear momenta are separately conserved. Yet the mathematical form for dealing with them run along parallel lines. I'm about to say that, relative to the XXI Century, relativity theory is in its Stone Age. ...and people stoned with it. Uh oh. Indeed. My point, that you didn't comment so far, is that effects have consequences. Relative to the original inquiry of this thread, you didn't comment on the main issue. Both observers send electromagnetic signals to each other. The distance between observers doesn't change and light speed is isotropic and constant. Why the moving observer see all signals send by the central observer and the observer and the central observer can't ever receive any signal from the moving observer (at the limit)? Do you see the consequences of a wrong analysis? First, "never" is a long time. Since the speed of light is not attainable by material things time dilation cannot be infinite. The moving observer will see all of the central observer's signals in a short, finite time (according to his clock). The central observer will be waiting a long time for the moving observer to get around to sending even the first signal. If he waits long enough, he'll see the signals; again, time dilation cannot be infinite for material things. The right analysis is that time dilatation is a consequence of the speed of light and the DISTANCE travelled by light. That is, time dilatation only is required for observations made at distance, by means of light, like Einstein said. Not the actual bull**** that follows because physicists only have a stone hammer to work with. There is no medium or mediator that can transfer a signal of any kind (including energy) at a speed greater than light. If you think there is, name it and demonstrate it. |
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#155
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Elvis, I think you're being unfair.
.... The right analysis is that time dilatation is a consequence of the speed of light and the DISTANCE travelled by light. That is, time dilatation only is required for observations made at distance, by means of light, like Einstein said. Not the actual bull**** that follows because physicists only have a stone hammer to work with. Our discussion has evolved to the transition from SR to GR, in the weak field limit, that was fairly much agreed upon in the early 20th century, that have empirical support. Most of the fella's have given more than an adequate airing of your misunderstandings, in fact I'm surprised you haven't been flamed to a crisp, so why throw insults? Ken BTW, before lecturing us, learn to ****ing spell "dilation", that's the 2nd ****ing time I've told you that! |
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#156
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On May 9, 8:50 pm, "El Enrrabadore-mor"
wrote: "Darwin123" escreveu na ... On May 9, 8:03 am, "El Enrrabadore-mor" wrote: "Darwin123" escreveu na ... Do you agree with the above picture? At this point, I do not have a clear image of your apparatus. I also don't fully understand the deviation from theory that you claim to be seeing. I've the deviation from theory in a 42+20 pages long so far, but can be made much shorter once I finish the story. Well, run it up the flagpole and see who salutes. Have you tried to publish this work in refereed literature? I know it is long, but the secret to refereed literature is to chop it up and submit your theory a piece at a time. If you have caught actual inconsistencies in the theory, it wouldn't take a long article to point out the fundamental error. Then you develop it one lemma at a time. If it is thrown out of one journal, and given no good reason to doubt your work, rewrite it for another journal. Some referees will throw it out of hand. However, you can point out irrational statements to the editor. Sometimes they over rule the stuffy physicist. The real danger is you may get detailed criticism from someone who knows what he is talking about. Someone may actually catch you at a mistake. Such reviewers have caught me several times. It isn't pretty. |
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#157
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"Darwin123" escreveu na mensagem ... On May 9, 8:50 pm, "El Enrrabadore-mor" wrote: "Darwin123" escreveu na ... On May 9, 8:03 am, "El Enrrabadore-mor" wrote: "Darwin123" escreveu na ... Do you agree with the above picture? At this point, I do not have a clear image of your apparatus. I also don't fully understand the deviation from theory that you claim to be seeing. I've the deviation from theory in a 42+20 pages long so far, but can be made much shorter once I finish the story. Well, run it up the flagpole and see who salutes. Have you tried to publish this work in refereed literature? I know it is long, but the secret to refereed literature is to chop it up and submit your theory a piece at a time. If you have caught actual inconsistencies in the theory, it wouldn't take a long article to point out the fundamental error. Then you develop it one lemma at a time. If it is thrown out of one journal, and given no good reason to doubt your work, rewrite it for another journal. Some referees will throw it out of hand. However, you can point out irrational statements to the editor. Sometimes they over rule the stuffy physicist. The real danger is you may get detailed criticism from someone who knows what he is talking about. Someone may actually catch you at a mistake. Such reviewers have caught me several times. It isn't pretty. Many thanks for your advises and everything else. To publish the work done (if I can make it conclusive enough) in refereed literature is nothing that could make me happy. Most certainly I'll put it in a web page or Wikipedia, I haven't still make up my mind. Actually, by the time, I'm taking some rest because get tired of gyro math/physics. What I really want is to produce electricity, starting at a minimum of 1MW per machine. Pretty easy. Most certainly I'm going to show it all on the Web, looking for Physicists and Investors. My experience so far showed me that high qualified people I've been talking (including the father of wave energy) couldn't understand enough to be sure about the physics of the gyroscope, even if they start saying otherwise (as usual). People need to see the equations. So far, I've made errors every time I've submitted the best I have. Some pretty stupid. No one ever pointed errors (which mean they were lost from the beginning). I've promised David Morin, from Harvard, I will send him the work done. I'm only 4 month late, but that's because I still haven't got the full picture. David Morin is good, very good. He got it on the book, but didn't finish, or else this is a dead end. (didn't read David Morin on Relativity, which is half of the book). He did one mistake. He solved the quadratic equation and claims there are two precession speeds, the low-precession and the fast-precession. One cannot solve it, or else if you solve the result don't agree with experiment by miles distance (actually infinite). I've done the numerical simulation and he is wrong. I've seen this very recently only. I've say it and my fish went away (one cannot be honest). The error, or what's missing to understand, amounts to less then 1% of the energy conservation and the gearbox behaviour I need. The really hard part is to have the picture of a gyroscope actuated by a mass-spring in resonance + waves force + external mass inertia around precession axis (the cause of the spring behaviour, because stores energy half of the cycle and gives it back the second half). Therefore, gyroscope is only a part of the full story, but for sure the most difficult. I'm on vacations, now. I'm recharging batteries in sci.physics for the real fit. |
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#158
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El Enrrabadore-mor wrote:
"Tom Roberts" escreveu na mensagem ... Look at the subject of this thread. "simplifying" to circular motion is what is being discussed. Such simplification makes your solution ridiculous, that's all. It's not "ridiculous", it is what this thread is about. I gave a general equation (in response to an inquiry), and then applied it to the subject of this thread. shrug If you find the thread subject (the original inquiry) ridiculous, YOU are the one who claimed it was "ridiculous", not I. If this is the level of your accuracy of reading and remembering what YOU wrote, then discussing anything with you is hopeless.... I must say it is not, since it is just a limit case of a very real and possible situation. Yes. THAT'S WHAT I SAID! [... further nonsense unrelated to the subject] Tom Roberts |
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#159
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"Ken S. Tucker" escreveu na mensagem ... Elvis, I think you're being unfair. ... The right analysis is that time dilatation is a consequence of the speed of light and the DISTANCE travelled by light. That is, time dilatation only is required for observations made at distance, by means of light, like Einstein said. Not the actual bull**** that follows because physicists only have a stone hammer to work with. Hi, Steve Wonder. Our discussion has evolved to the transition from SR to GR, in the weak field limit, that was fairly much agreed upon in the early 20th century, that have empirical support. If the discussion has evolved to GR I didn't notice. Where is it? Wait, you're confused about the equivalence principle and you confuse gravity with centrifugal force? I've a secret for you, gravity and centrifugal force are not equivalent in nature. Gravity follows an inverse SQUARED radius function. Centrifugal follows an inverse LINEAR radius. Only for stable orbits, where a body can be considered to be in free-fall (no forces), one can make such approximation. Most of the fella's have given more than an adequate airing of your misunderstandings, in fact I'm surprised you haven't been flamed to a crisp, so why throw insults? Ken BTW, before lecturing us, learn to ****ing spell "dilation", that's the 2nd ****ing time I've told you that! "Dilatation" follows natural from my native language, and I can't well myself. Besides that the spell checker is happy with that word, so... (thanks). |
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#160
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"El Enrrabadore-mor" wrote in message
Wait, you're confused about the equivalence principle and you confuse gravity with centrifugal force? I've a secret for you, gravity and centrifugal force are not equivalent in nature. Gravity follows an inverse SQUARED radius function. Centrifugal follows an inverse LINEAR radius. No! The inverse square relationship for gravity is the consequence of a particular geometry of the source mass. The field from a point source or spherically symmetric source diverges. For spherically symmetric sources the resulting field varies as the inverse square. Consider instead an infinite sheet of mass. In such a case the field lines are parallel and the potential drops linearly with distance. Or consider the hypothetical hole bored through a hypothetically uniform density planet (go pole to pole to avoid coriolis complications). Thus, as Einstein said, acceleration (centrifugal included) is equivalent to a *uniform* gravitational field. Only for stable orbits, where a body can be considered to be in free-fall (no forces), one can make such approximation. Any force that results in a uniform acceleration will be equivalent to a uniform gravitational field. A time varying force would be equivalent to a time varying gravitational field, which we don't find a lot of in our day to day experience, but we can certainly concoct hypothetical situations where it can happen. |
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