Another sub-confirmation of the ILLEGALITY of applying the Galileo-Einstein Principle of Mechanical Relativity to media..

I remind it to whom have forgotten or are ignorant of it:

In two inertial systems, all the laws of physics are observed in the same way, that is, no physical experiments (mechanical, thermal, optical, etc.) in such a system can determine whether it is moving or at rest.

The conclusion from this principle is that as long as THERE is NO ABSOLUTE REST OR ABSOLUTE MOTION, IT DOESN’T MATTER WHAT is MOVING RELATIVE TO WHAT!

This conclusion is often UNJUSTIFIABLY AND UNREASONABLY extended to cases of mutual movement of interacting media and bodies! They say it doesn’t matter WHAT is moving relative to WHAT: The medium is relative to a body that is “stationary in the laboratory frame of reference” or the body is moving relative to a medium that is stationary in the same frame of reference! Such an application of the conclusion of the Principle of Relativity of Motion is ILLEGAL, although it is generally accepted and considered quite correct and justified.

It is true of bodies that remain unchanged both at rest and in motion. But media, gases and liquids, CHANGE their physical properties when they move, and therefore the principle “IT DOESN’T MATTER WHAT MOVES RELATIVE TO WHAT” DOES NOT APPLY to them!

Another example of its inapplicability is the effects in the superfluid liquid Helium Two.

This phenomenon was discovered by P.L. Kapitsa in 1938, when Kapitsa has found that helium at temperatures close to Absolute zero Kelvin, 2-3 degrees above it, exhibits an unexpected quality, flowing freely through extremely thin capillaries with a diameter of one hundred thousandth of a centimeter! (Or one ten-thousandth of a millimeter, or one-tenth of a micron, or one hundred nanometers, or one thousand Angstroms)

Therefore, this property of Helium Two was called superfluidity, that is, any noticeable absence of “internal friction-coupling” of liquid atoms. In 1940 – 1941, L.D.Landau gave a phenomenological mathematical description of this phenomenon. assuming that two helium atoms bind to each other in pairs and such pairs no longer adhere to others, therefore they DO NOT INTERACT with each other, they do not exchange momentum-energy with each other.

At the same time, a strange paradox was discovered: Experiments with attenuation of torsional vibrations of a disk immersed in Helium Two DID NOT REVEAL ANY phenomenon of loss of internal viscosity! In SUCH experiments, Helium Two behaved like ordinary liquid helium with some internal viscosity, NO SUPERFLUIDITY!

Why???

Precisely because in such cases it is IMPOSSIBLE to apply the principle of relativity of mechanical motion. WHAT IS IMPORTANT HERE IS WHAT IS MOVING RELATIVE TO WHAT!

Helium Two relative to the capillary wall, albeit an extremely narrow one, or a disk relative to this Helium Two!

Another proof of the inapplicability of this principle is, also, in the phenomenon of superfluidity, the so-called Landau SUPERFLUIDITY CRITERION, which determines a certain critical limit of the velocity of a superfluid flow. It turns out that at a certain velocity of the flow of superfluid Helium Two through the capillary, exceeding the limit specified by Landau, the superfluidity DISAPPEARS and Helium Two regains the viscosity usual for liquid helium!

What does this mean?

About two phenomena:

The first is that processes that interrupt the state of superfluidity are developing in a Helium-Two stream moving at a certain “supercritical” velocity.

Secondly, according to the above, the INTERACTION of pairs of atoms with each other in Helium Two is STILL present, even under conditions of superfluidity, otherwise simply ANY velocity of this flow WOULD NOT CHANGE ANYTHING IN IT!

That is, the hypothesis of different types of viscosity in any flow of liquid or gas is confirmed:

Transverse viscosity and Longitudinal viscosity.

In a liquid or gas at rest, they are the same! Because there is no movement!

In moving materials, the transverse viscosity decreases, and the longitudinal viscosity increases along the flow velocity vector! Obviously, the vectors of the forces of electric and magnetic adhesion of atoms or molecules to each other, as they move, rotate along the velocity vector and thereby increase the longitudinal and decrease the transverse viscosity.

To summarize:

Once again, we see that the Principle of Relativity of Mechanical Motion CANNOT be automatically, thoughtlessly extended to the relative movements of media and bodies interacting with each other!

This, by the way, is a confirmation of the ABSOLUTENESS of mechanical motion relative to our electromagnetic Space-Time, that is, relative to a certain Absolute Frame of Reference, which are electromagnetic waves that CREATE what we call “space and time.” (See the series of notes on the topic, starting with the note “On some additions to the Special Theory of Relativity” etc.)

Faciant meliora potentes.

If I’m wrong, let my seniors correct me.

4 VI 2026