Could this be used as an engine of some kind? The spinny thing giving off EM waves and those waves are caught by something like a solar sail?
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Would this mean that a rotating body in space would eventually slow down? In other words, amplifying EM radiation draws energy from angular momentum?
If rotation within this higher-dimensional space causes analogous effects to the rotational amplification observed in the experiment, it could imply new ways of energy transfer between dimensions. AKA -- ZPM from Stargate
Get ready for an onslaught of "Physics behind flying saucers LEAKED" clickbait coming to a feed near you. Whether any of it is actually applicable doesn't matter, the clicks must flow.
"According to a remark by P. L. Kapitza, the effect is analogous to amplification of sound by reflection from a resting-medium boundary that moves with supersonic velocity... In the case of plasma waves, a similar effect was considered recently by Ostrovskil. Mention can also be made of earlier studies dealing with the motion of a conducting liquid in a resonator or the motion of carriers in the interior of an elastic piezoelectric or over its surface."
> "Here, we show that this 60-year-old long-sought effect has been concealed for all this time in the physics of induction generators. Induction motors are constituted of two components: an external stator, composed of circuits generating a rotating magnetic field, and a rotor, also composed of several elementary circuit loops, usually in a squirrel cage configuration. By replacing the internal circuits of the rotor with a solid metal cylinder as in Zel’dovich’s original proposal, and using a gapped toroid within a LC resonator as stator, we isolate the key physical effect and unambiguously observe Zel’dovich amplification, which manifests itself as a negative dissipation induced by the rotor in the LC circuit."
• To know what keywords get UAP podcasters drooling, you must have watched your fair share of UAP podcasts.
• Your comment is the only one so far to make the association between the article's keywords & UAP, implying that you are yourself making the same association that someone interested in watching UAP podcasts would be making, in which case..:
• ...what is the difference between you and the would-be viewer of the next UAP podcast you are warning away?
They’ve been coming up on the front page of Reddit several times this year. I’m in agreement with the OP and I’ve only casually observed those threads
From the spinning metal cylinder you can extract EM energy. It’s like a flywheel. The trick is how do you bring up the spin in the first place. The indication here is I guess that you can amplify the spin with EM waves.
“…depending on its rotation speed Ω compared to the field oscillation frequency ω, it can either absorb or amplify.”
Though i don't recognize all of the terminology of OP, so perhaps that disqualifies my observation.
Also, between the "could this be used for vehicles" parent comment and that downvoted interdimensional energy transfer comment below, it doesn't take a Aliens-Did-the-Pyramids Guy to see what dots were starting to be connected... I might as well be the one to flag it explicitly and earn some imaginary internet points.
But who knows, maybe I'm actually the goberment disinformation agent trying to keep all this under wraps...
This sounds quite a bit like what Steorm[1] was doing years ago. If ultraconductors[2] worked, you could actually build a mechanical device that had losses low enough to actually gain energy once a critical speed were obtained.
[1] https://en.wikipedia.org/wiki/Steorn
[2] https://patents.google.com/patent/US5777292A/en
(Claim 7 is for material with a conductivity of 10^11 S/cm, which is 150,000 times better than copper)
> Could this be used as an engine of some kind?
What about helical polarization?
"Chiral Colloidal Molecules And Observation of The Propeller Effect" https://pmc.ncbi.nlm.nih.gov/articles/PMC3856768/
Sugar molecules are asymmetrical / handed, per 3blue1brown and Steve Mould. /? https://www.google.com/search?q=Sugar+molecules+are+asymmetr....
Is there a way to get to get the molecular propeller effect and thereby molecular locomotion, with molecules that contain sugar and a rotating field or a rotating molecule within a field?
Not familiar with that idea, but this construction sounds a bit like: "If only you had an (infinitely) rigid rod, you could push one end to communicate faster than lightspeed."
Or in balder terms: "If only we had a subtly impossible component, we could make a blatantly impossible machine."
Simple example: put your frictionless spherical cow on a spinny plate. Make it a very small cow; it's only there to have a point of rotation. Why frictionless? You don't want its butt to catch fire. Why spherical? It'll need to maximize volume dedicated to arm muscles; see below.
Have the cow hold two ropes, each leading to a full-sized cow 10m away. Apply force to those cows (blow on them, or magnetize them and do a solenoid thing, or just make them very gassy cows and orient their spherical butts in opposite directions). Get them spinning at 1Hz. (This is very fast; remember the diameter is 20m.) Now have the middle cow pull the ropes, shortening them to 10cm. It's now spinning at 1Khz. 10mm gives 1Mhz. Conservation of angular momentum, baby.
Do this in a vacuum in microgravity, and you don't need the center cow.
Sure, if you're doing this at a bovine scale, the tension is ridiculously large. What makes it infeasible at a small scale?
> you’d really need perfect incompressibility such that pushing one end of the rod would propagate the pressure wave to other end instantaneously
I.e. by pushing an abstraction of "perfect incompressibility" and "instantenous propagation of pressure waves" to the point stops corresponding to reality. Those ideas are descriptive simplifications, abstracting away the underlying process of matter / fields interacting sequentially, an interaction that propagates at the speed of light.
It's the same kind of thing like assumption that array access is O(1). It is, until the array gets so large the process of finding the right place in memory becomes visibly O(n).
Or, on a more basic level, arithmetic on numbers seems to be O(1) with respect to the values of the numbers. Almost all programming practices and popular algorithms depend on that assumption, but it only holds for numbers that the hardware can process in one go. Adding 64-bit numbers is constant-time. Adding 64000-bit numbers isn't.
At that point it's starting to sound less like a rigid rod and more like changing spacetime itself so that the two locations are closer together. :p
The tensile stress on a spinning round, homogeneous object is p * r^2 * w^2, where p is density, r is radius, and w is angular velocity. Using your numbers for a steel cylinder with density 8 g/cm^3 gives a tensile stress of (8 g/cm^3) * (5 mm)^2 * (2pi*1 MHz)^2 = about 8 TPa which vastly exceeds the tensile strength of steel or any other known material. Using cows connected by ropes would be even worse because the enormous centrifugal force would be borne by only a small rope.
- A non-Newtonian fluid
- A ferrofluid
- A non-Newtonian ferrofluid
- Or, a liquid metal, like:
- gallium, or
- mercury
Thinking about this makes me imagine a potter's wheel for shaping a ductile metal. It spins really fast, but you can only reshape in the outwards direction, and the resistance goes up dramatically towards the center. Oh, and if anything flakes off, you're dead. But before you die, you could probably make some pretty artwork.
Larger drivers can generally handle more power, and lower frequencies require more air movement (requiring more power) to be perceived at a comparable level to higher frequencies. An 18” woofer can move much more air than an 8” woofer. The design of subwoofers is of course much more complicated than just “use a bigger woofer” but it makes the task much easier.
Another way to think about it - 2-3” headphone drivers are capable of reproducing bass and subsonic frequencies that are perceived at a reasonable level. This is because they’re right next to your ear, so there is very little air that must be moved to reproduce those frequencies. Same with teeny tiny IEM drivers, which require even less power. Larger drivers just make it easier to design a subwoofer that can move enough air to reproduce those frequencies in a room.
However, if you do know science, you know pretty well all of this is just mumbo-jumbo so the suspense of disbelief disappears and there's just nothing left in the book that is sufficiently interesting.