MigL

The 'rest' frame of the particle is the one where the particle is at rest.

OK Then can you explain who, or what, was conscious 13.8 Billion years ago, before atoms were able to form ?

That deBroglie relation is observer dependent. The velocity, as well as the wavelength, change depending on the relative velocity of the observer. Alternatively, the 'rest' wavelength is measured in the particle's rest frame, which, unlike photons, can be at rest. Relativity is another thing you cannot simply wish away.

How would we know what the properties of space-time actually are ? Is it flat, curved or inside-out ? Remember, I'm in the camp that claims Physics does not tell us what 'reality is, only how it behaves ( see Physics and 'Reality' thread ). All we can say for sure, is that the mathematical model, including geometric curvature, makes extremely accurate predictions about gravity, and how test masses behave when affected by it. Anyone who claims to know more about the actual 'reality' is simply confused and deluding themselves.

Hamiltonian formulation is essentially an energy equation. ( except when co-ordinates are time dependent ) And sure enough, energy is also frame dependent. Seems you just can't get away from this frame dependency thing, Martillo.

When people, or Physicists, speak of 'geometry' or 'fabric', are they referring to the model or the actual space-time ? All we know is that a model, incorporating 'geometry', or curvature if you will, manages to very accurately predict what happens with test masses in actual space-time. We have no idea whether the 'reality' of actual space-time, or its 'fabric', incorporates such curvature. But the mathematical model, which is GR, does utilize geometry, also mathematical, to make its extremely accurate predictions. Are you maybe mistaking the model for any undelying rality, Lorentz Jr. ( which we may possibly never know ) ?

A lot of Physics has happened in the last 103 years. A Einstein was smart but even he could not predict the future. A field is defined by numerical values, and directions, at each point in space. That is exactly what geometry does at every point in space-time. Why do you think 'geometry' does not define a field ?

Quite a few things relating to your diagram are non-sensical. The bottom shows "emptyness', which has never existed, nor will it ever. Even at Planck scales there are quantum fluctuations and virtual particles; this would have been a feature of the quantum foam before the hot dense state of the Big Bang. Further up you have 'dark photon' in the same box as primordial Higgs field and Photon. The 'dark' descriptor is used when we don't know the 'make-up of gravitationally interacting matter that affects galactic rotation, or an energy that provides an accelerating impetus to expansion, but if we know it's a photon, surely it isn't 'dark'. Along the right hand side you have some gibberish concerning 'consciousness hue'. Now, hue is defined as the wavelength at which energy output is greatest for a given color. How that is maximized at the Big Bang, and decreasing ver since,is beyond my understanding, unless your translator eturns 'consciousness hue' when it should be returning order ( relating to entropy ); I doubt very much there was any consciousness in our universe at the time the Big Bang started. Please try again ( to make sense ).

Wow. Go to work for a coupl of days and this thread has moved on quite a bit; and I hadn't even considered fictitious forces, Joigus. Point I was trying to make Martillo, is that you can't have a force in one frame, and not in another, and call that force 'real', as all frames are equally valid. And to be clear, both Newtonian and GR gravity are field theories, TheVat. If you consider the proper definition of a field, then geometry is the field in GR. ( quoting AJB ) I watched a movie with Ben Affleck, The Accountant, where he plays an autistic accountant to criminals and helps bring them to justice. As cover names he uses autistic mathematicians/authors/philosophers from the past, like Gauss, Carroll, Wolff, etc. Apparently they were all on the autism spectrum.

You are standing on the ground holding a bowling ball, and it weighs about 12 to 16 lbs. It is a strain to hold it at arms length. Now go parachuting while carrying that bowling ball; you will find it weighs nothing after you jump out of the airplane. Yet you and the bowling ball are still falling due to gravity. What happened to your force, Martillo ???

Just to be clear ... You can have individual 'legs' of CPT symmetry break, as long as that break is made up for by a break in another 'leg'. For example, a CP violation would have to be made up for by a T violation, thereby keeping CPT symmetric and Lorentz invariance, in order to preserve physical laws. Or am I mistaken, because I can think of cases involving the weak interaction where P symmetry is violated, and anti-matter, here C symmetry is violated. But you do it extremely well ...

I know I have bad eyesight, but, other than Seth's pictures ( only the 2nd and 3rd ), I couldn't spot any of them. I'd make a terrible predator, and starve to death ...

Not really. Relativity, special as well as general, is purely classical. The distinction is due to Max Planck; classical Physics has no quantization, or effects thereof.

I would have no problem taking that step also. I only mention 'things' because the questions are always"But what is an electron, really ?" or "What is a photon ?" or possibly your favorite "But what is gravity, really ?". How would it make a difference ? Everything we see ( contingent ) affects us through interactions. That which is not contingent does not affect us through interactions. IOW, whether it is there or not makes absolutely no difference to us, or the world around us. Why is it needed in our models, and, by Occam, why is it needed at all ? ( argument applies to religion/mysticism as well )

Sure. The version described in your link is a 'developed' version, JDAM-ER ( extended range ). Developed for Australia, it features fold-out hi-aspect rato wings for greater glide distance, facilitating greater stand-off deployment. It has a range of approx. 40 mi. whereas a standard JDAM has to get much closer to its target to deploy, as it has a typical range of 10-15 mi.

Very much with you on this, Swansont. Physical models describe what 'things' do, not what they are. Our two most successful models make such accurate predictions that people, even Physicists, start thinking they are describing actual 'reality' They couldn't be farther from the 'truth'. As you already stated, Quantum Field Theory decribes 'reality' as fields on fields, all on a fixed background stage. General Relativity ( and LQG ) go one better and take away the fixed background stage to be replaced by ( another ) geometric field, which can be affected by the other fields. So where is the 'reality ?

No. I had two, but one sister passed away 2 years ago. The other is now very lonely and very needy. Oh, and all my furniture needs replacing because it's all scratched.

Believe those are called “missiles.” Not so much for added range, but newer bombs are not free-fall or ballistic, they are laser guided or have GPS guidance, which means they need a way to steer, hence, the control surfaces. See here Joint Direct Attack Munition - Wikipedia

What does any of this have to do with 'N' ? My cat wants an answer, or else she'll step all over the keyboard vujiutde yzdj7.,7893 38r [\[p0097GG ucsiv we|r4 too late !

Interesting. I would have thought you'd get the best range from a glider design, with very high aspect ratio wings ( ratio of span to chord ), which would allow for low loss of altitude with distance. I would have never thought a hypersonic design to be capable of sustaining the needed lift. PS I'm sure Airbus can do better 😀 .

Due Process ??? I say round them up, and re-locate them to another forum. ( as was recently proposed with the homeless )

Fair market value, or more accurately, just compensation, is decided by the courts, not the Government. Not that it would make much differene in the US, as the final arbitrer, the Supreme Court, is in the 'pocket' of the party that appointed them.

Turns out the problem that led to the New Palestine derailment, and subsequent burning of Vinyl Chloride, Di-isobutylene, etc., coould have been avoided had reccomendations from previous derailments been implemented; brakes on every axle of the cars. But the rail industry lobbied heavily the previous orange haired President, who waived the reccomendations. Just another of D Trump's wonderful legacies.

I feel for you, my friend. But that's a fight I can't fight

I don't know, Stringy. "Vernacular" sounds obscene and offensive to me ... 😄 😄