# SergUpstart

Senior Members

442

1

1. ## Why does it seem to us that the universe is expanding where there is no gravity

Here's what you wrote "Frankly, this does not seem to be a difficult concept; the concepts of motion and force it evokes are Newtonian. If gravity in a region is strong enough to prevent expansion, that’s what happens. " I just asked a counter question, the meaning of which is "Won't we need the fifth interaction to explain the nature of this Newtonian force ?"
2. ## Why does it seem to us that the universe is expanding where there is no gravity

Yes, the expansion of space is not a force. The expansion of space is a change in the scale of distances. In the first post of this topic, I offered my explanation for the fact that we observe a change in scale only in intergalactic space.
3. ## Why does it seem to us that the universe is expanding where there is no gravity

Then which of the four interactions is this force associated with?? If with gravity, then it is necessary to introduce a negative mass, because this force, the force of repulsion.
4. ## Why does it seem to us that the universe is expanding where there is no gravity

Does this mean that there is an anti-gravitational force in the universe and is this force a manifestation of the fifth fundamental interaction ?????
5. ## Why does it seem to us that the universe is expanding where there is no gravity

A correct remark, in the title it would be necessary to write " Why it seems to us that the Universe expands ONLY where there is no gravity"
6. ## Why does it seem to us that the universe is expanding where there is no gravity

Isn't that what I'm talking about? Where there is gravity, more precisely, where gravity is stronger, the change in the distance scale is slower than where gravity is weaker. And we see only a relative change in scale.
7. ## Why does it seem to us that the universe is expanding where there is no gravity

Hawking wrote in his book "A Brief History of Time" (or in "M-Theory" ) that it is a big mystery that the universe expands where there is no gravity. That the expansion of the universe cannot be explained by a simple change in the scale of distances. After all, if all the sizes and distances, from the size of atoms, the radius of the Earth, the distance from the Earth to the Sun, the diameter of the galaxy and further to the distances to distant galaxies, would change in the same number of times, then we would simply not notice it. This is indeed the case. Thus, the distance standard changes more strongly in intergalactic space than in galaxies where there is gravity. And it's easy to explain it. The distance standard decreases in proportion to the gravitational potential. Let's assume that in intergalactic space the gravitational potential is equal to Phio , and we are inside the galaxy, where the total gravitational potential is equal to Phio+Phig, where Phig is the gravitational potential of the galaxy . Now let's assume that after some time the gravitational potential of the Universe between the galaxies will decrease and become Phi1. Then the total gravitational potential inside the galaxy will become Phi1+Phig. It is easy to see that the gravitational potential between galaxies will decrease by a large relative amount, because For example, if Phio is taken as 100%, Phig as 2%, and Pfi1 as 98%, then the gravitational potential inside the galaxy will become 0.98039% of the initial one, and between galaxies it will become 98%. The distance scales will also change accordingly, but we will not notice that our distance scale has become 0.98039% of the previous one, we will only notice that the distances between the galaxies have increased by 0.00039% . That's why it seems to us that the universe is expanding where there is no gravity.
8. ## Military history/history

Russian President Vladimir Putin, in an interview with schoolchildren, called the war that Peter I waged with the Swedes a seven-year war, instead of a Northern one. The schoolboy pointed out the mistake to Putin. Some political scientists have already said that Putin made this mistake deliberately to make the student feel smart.
9. ## Lorentz invariant gravity (split from Is Gravity a Force?)

The author of this article points to 17 unresolved problems in GRT http://sergf.ru/litgen.htm He believes that these problems can be solved within the framework of the LITG but using the GRT metric. In LITG, gravity is a force. The above features of general relativity show that most of problems of theory of gravitation may be removed by use of LITG with the idea of using a metric similar to metric of general relativity, as a first approximation to a more accurate theory of gravitational field. In this case, general relativity becomes an extension of special relativity and has its function in the case when the results of spacetime measurements are dependent on existing in a system of electromagnetic and gravitational fields produced by sources of charge and mass. If there were not of influence of gravitation on propagation of light, similar to effects of deflection of electromagnetic waves from the initial direction, changing the wavelength and speed of its propagation, instead of general relativity would continue to operate special relativity and would be valid LITG. As well as special relativity is not a substitute of electrodynamics then general relativity can not be instead of LITG or electrodynamics, which have arisen and exist independently of general relativity. From the point of view of LITG, Einstein-Hilbert equations for metric are needed to determine the metric tensor that defines effective properties of spacetime for a given energy-momentum distribution, and changes metric tensor of flat Minkowski space. After finding the metric tensor from the equations for the metric, electrodynamics and LITG are not just Lorentz covariant (it is a special case of covariance that take place only in special relativity), but covariant for all the possible systems of reference in which the metric can be found. It follows from the possibility of writing the equations of these theories in the vector and tensor form. Then LITG becomes the
10. ## Climate Change Tipping Points:

Every year, the warm summer period increases by an average of 10-15 days, respectively, the winter period decreases. Thus, it is impossible to exclude the fact that winter in Ukraine will not be at all soon. This was warned by the director of the Ukrainian Hydrometeorological Center Mykola Kulbida. According to him, this may happen in 20-25 years,
11. ## Redshifted Light

Look at the model of the universe with zero energy. https://en.wikipedia.org/wiki/Zero-energy_universe The energy of photons in the Universe decreases and at the same time its gravitational energy decreases.
12. ## Two objects going [near] the speed at light(Relativity)

Are we living inside a black hole???
13. ## Could the real size of the universe be infinite?

Inflation in the economy is the depreciation of the dollar, and inflation in the universe is the depreciation of the meter.
14. ## Experiment verification of General relativity

Bottom - the lower point from which the photon rises to the height h I'm sorry, naturally an hyperfine structure. I use an online translator for communication and such incidents happen.
15. ## Experiment verification of General relativity

Have they been detected? Does the accuracy of a quartz watch allow you to detect these effects? A typo, it was meant that a transition is used that does not change the main quantum number I wrote above that According to Yanchilin's theory, the atom at the bottom emits a photon at a frequency with a violet shift of 2gh/c^2, but going up it experiences a shift to the red side by 3gh/c^2. If, during the transition without changing n at the bottom, a photon is emitted with a shift to the red side gh/c^2 and there is another shift by 3gh/c^2 during the ascent, then the total shift will be 4gh/c^2. Ok, I will deal with an ultra-thin structure.
16. ## Experiment verification of General relativity

I found an explanation in the framework of V. Yanchilin's quantum theory of gravity that when approaching a massive body, the course of the atomic clock on caesium slows down. V. Yanchilin explained the increase in the frequency of photons emitted by an atom when approaching a massive body, relying on the Niels Bohr model of the atom. According to this model, an electron in an atom can only be at strictly defined energy levels, each level corresponds to its own the radius of the orbit. According to the quantum theory of gravity, when approaching a massive body, the square of Planck's constant decreases inversely according to the absolute value of the gravitational potential, this means that all the radii of the orbits in the Bohr atom model also decrease inversely proportional to the absolute value of the gravitational potential. In the formula for the energies corresponding to the orbits of the radius of the corresponding orbit is in the denominator, which means that the electron energy for each energy level increases, and therefore increases the energy that is transferred to the photon that is emitted during the electron transition from a higher energy level to a lower one. The frequency of the photon increases accordingly. And now let's look at how the cesium atomic clock works. In them, the frequency is set by the electron transition with non-medzhu energy the levels of the model of the Bohr atom, and the transition of an electron between sublevels, which are formed by the splitting of one of the levels due to spin-orbit interaction of the electron's magnetic moments. For the energy of such a transition, there is the following formula In this formula, the radius of the orbit is not in the denominator and in the numerator, which means that when approaching a massive object the energy of the photons emitted in the transition between sublevels, not increases and decreases, thus decreasing their frequency and therefore, the course of a cesium atomic clock. It follows from the above that the deceleration of the current of the atomic clock does not occur in spite of, but in full accordance with the quantum theory of gravity. To finally decide which theory is correct, the quantum theory of gravity or the general theory of relativity, we need an experiment with a clock whose frequency is set by the transition of electrons between the allowed energy levels of the Bohr model. But, unfortunately, there are no such watches yet. In addition to the above, it should be added that another effect can be detected here. For an external observer, the photons are located at the top, the photons emitted during the transition between such sublevels should experience a stronger redshift, 4gH/C^2, instead of gH/c^2 for photons emitted at normal transitions. From this point of view, you should pay attention to the wavelength of 21 cm, because it is emitted by hydrogen during the transition between sublevels. If it is possible to measure the red shift at a wavelength of 21 cm for a distant galaxy, and it turns out to be relatively large, than the red shift of the spectral lines of other chemical elements, this will testify in favor of the quantum theory of gravity.
17. ## Making Cars More Efficient

I have an idea how to make long-range trucks more efficient. They must have combined wheels that will allow them to move both on rails and on highways. For the transfer between remote cities, trucks are linked and the locomotive takes them from one city to another, upon arrival at the place, they are uncoupled and each goes to its destination.
18. ## Negative Mass and how it effects us. I will take any questions or comments on your points of view as well! My Views and Thoughts on the Topic!

The negative energy must correspond to the negative frequency, E=hf. How can the frequency be negative? Only if time moves in the opposite direction.
19. ## Steelworks of Saturn

I believe that the delivery of metals from asteroids to Earth will never be profitable, the only exception may be Uranium 235. But this does not exclude the use of metals from asteroids in the future. It will be possible to fly there with equipment and build spaceships on the spot.
20. ## Antimatter

Within the multiverse, this problem could be explained by the fact that universes are born in pairs. But it is impossible to verify this, we are not able to observe the Outside World.
21. ## Steelworks of Saturn

$10,000 quadrillion asteroid Psyche? By the way, you can’t (at present) put a true price on objects such as asteroids. But many have tried to estimate the worth of asteroid Psyche, with its metal-rich composition. One estimate suggests the massive, metal-rich object is worth$10,000 quadrillion (that’s 15 more zeroes), more than the entire economy of Earth. https://earthsky.org/space/asteroid-psyche-metal-or-rubble-pile/
22. ## Questions: differences between M-theory & Multiverse?

Yes, observations of the Outside World ( the Multiverse ) are not available to us. And this translates the concept of the multiverse from the field of physics to the field of philosophy (in combination with mathematics) . Do you not consider philosophy to be a science? Exactly
23. ## Questions: differences between M-theory & Multiverse?

I like the concept of a Multiverse because in it the appearance of a universe like ours ( and therefore the Big Bang ) is not a unique phenomenon and, therefore, it occurs for natural reasons and is not an act of creation. The dream of any atheist is to explain the appearance of the Universe without the participation of God.
24. ## Why don't entanglement and relativity of simultaneity contradict each other?

You can formulate it this way. But only then it is necessary to add that this event occurs at once in two places separated by a distance.
25. ## Why don't entanglement and relativity of simultaneity contradict each other?

In QM, the fact is that the glove itself in the box does not know what it should be, left or right, until one of the boxes is opened.
×