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    Physics General Subjects Thread

    kvs
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    Post  kvs Tue May 21, 2024 2:10 am

    TMA1 wrote:Strange. What could account for the upwelling of metals like that? Has phenomenon been observed before?

    Also kvs what do you think of the scientific communities as they stand right now? As a layman after learning about stuff like the replication crisis it is concerning at least from where I stand.

    The video describes a phase separation process below ground with a subsequent differential transport of the metal to the surface while the remainder
    stays behind.   You see the iron lava in a circular pattern around the center which supports this hypothesis.   It looks like there is evidence of such iron
    rich deposits in other parts of the world but much older.   So this volcano is rare.

    The scientific community is afflicted with the same dynamics as the rest of society.  So you have institutional group-think and elites who push an agenda.
    I think it is funny how people think that bad science is a feature of the past.   If civilization survives into the coming centuries, people in the future will
    look back on the current era as a link in the same chain of BS and politics-instead-of-science.  

    I am not going to trot out the tired "climate science is a fraud" line.   Climate science is actually one of the more sane and anchored to reality branches.
    All the lunatic alarmist crap is pushed by outsiders from politicians to woke activists.   My involvement with it is tangential.  I know what climate models
    are and their limitations.  Exxon and other corporations spent hundreds of millions of dollars trying to smear climate science like Big Tobacco spent vast
    sums trying to smear any link between cigarettes and poor health.  You even had clowns who worked for tobacco moving into the same racket against
    climate science.  

    Any political use of climate science is not the fault of climate scientists.   The elites will ass rape you with the truth if it works for them.   People make
    the silly mistake of thinking that the elites only use contrived lies.   The best lies are mixed with truth.  

    As you may have surmised, I have a negative view of other branches of physics, specifically astrophysics and cosmology.   It really is corrupt and this
    is related to the fact that it is very hard to pin down with observations (unlike climate science which is based on laboratory tested physics).   They
    tell you that they are observing black holes like the ones in the broken math of GR, but there is no way that they can make such assertions.   The
    term broken math is not hyperbole.  It really is this bad.   We have Orwellian redefinition of "coordinate singularity" and routine use of non-diffeomorphic,
    aka non-information-conserving, coordinate transforms.   What is the point of deriving solutions when you create and destroy information through
    ludicrous manipulation.   But the "big names" push this shit and if you question their "wisdom" you are a crank (aka heretic).

    We had the big name, big BS issue in geology before the 1960s.   Plate tectonics was considered heresy even in the 1950s.  I hate the concept of
    consensus in science.   This is BS group-think, and not objectivity.   Even if most scientists support the right theory, that means nothing.  The theory
    cannot depend on popular support.   It has to stand on its own and be testable and falsifiable.   Ego investment is anti-science.  You can see this
    BS today in archaeology where it is simply heresy to question that there have been only 6000 years (a funny Biblical time span) of human civilization.
    Egyptology is total garbage where structures are attributed to rulers based on finding some random item in their vicinity and where the alleged builders
    did not have the know-how and ability to do the building.   The official Egyptian history is a paradox.   Pre-dynastic Egyptians could fashion high
    precision hard stone vases (requiring lathes with hard metal cutting features) but the subsequent dynastic Egyptians who supposedly built the
    pyramids could only make crude alabaster vases by hand and did not have any metals other than copper and bronze (too soft to work granite and
    other hard stone).    Clearly archaeologists are not qualified to build a historical narrative since they cannot process the data due to lack of
    required engineering and scientific competence. Archaeology is not a hard science but it is typical of the rot.


    Last edited by kvs on Tue May 21, 2024 2:14 pm; edited 2 times in total

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    Post  kvs Tue May 21, 2024 4:21 am



    Breaking the current dogma can answer interesting physics questions.   Take a look at video of the Sun's surface during coronal mass ejection
    events.   You see blobs of dense material hitting a surface.   If the Sun was a gas this would not be possible.    All gas will stratify under gravity
    with an exponential function of radius.   This is true even if there is no condensed matter core (e.g. like the Earth with its atmosphere).  So there
    would be no "surface" of the Sun and it would be like the outer layer of the atmosphere which has almost no density.  

    The current astrophysics dogma will have you believe that the surface of the Sun is an optical illusion.   Really?  A hot, opaque plasma somehow
    allows a line-of-sight illusion based on seeing deeper layers?   That is the only type of illusion one could contrive and obviously it's impossible on its
    face.  This "illusion" magically supports surface waves (exactly like the ones you see when you throw a rock into a body of water).   This already
    is retarded nonsense since there could be no coherence between a deep layer of the Sun where the ripples line up vertically and give you an
    "illusion" of seeing ripples on a surface.   In a gas, such ripples are only possible at sufficient density and their wavelength will be a function of the
    density.  Thus they cannot stack vertically under exponential stratification, even if you assume that there are is not circulation inside the Sun "gas ball".

    You also see distinct Rayleigh-Benard convection cells on the Sun's surface.   There is no way such cells could be coherent over a deep layer.   Their
    physics dictates that their horizontal scale is roughly the same as their depth.   So any line-of-sight through a deep layer of the Sun would be overlapping
    multiple layers of such convection cells.   But that is nonsensical as well, since the convection would organize into much larger structures instead of
    being layered in small cells.  On Earth you see Rayleigh-Benard cells in the boundary layer adjacent to the surface (about 1-3 km thick).   You also see
    such cells in your frying pan or pot when you have relatively shallow of water or oil being heated from below.  But as everyone knows from their cooking,
    the circulation in a pot of soup (thick layer of liquid) is not organized into small cells.   Thus, there is an actual surface of the Sun and it supports
    Rayleigh-Benard convection cells.   This should tell us something about the actual density profile: it would make sense for there to be a transition
    layer where the metallic hydrogen condensate transitions into a gas.   This layer will be like a thin layer of fluid in pan heated from below.  

    The cherry on top of this astrophysics turd cake is: why would you see the same optical illusion regardless of the angle of observation?  One can
    suppose that looking down along a radial line at the Sun will give an apparent surface, but this cannot be true if one looks tangentially at
    the Sun.   The Sun cannot have a uniform disk appearance, it should have a decrease of light emission intensity away from the center.   There should be
    almost no emission at the "edge".   A corollary is that coronal flares should not be happening at the edge of a disk (such as you see during a full
    Lunar eclipse) but somewhere closer to the center.   You would see flare filaments not emerge from a distinct surface but from a low emission zone
    since they would have more intense emissions.

    The official narrative is cringe nonsense.  There is a lot of chutzpah monkeys in science feeding you their shit.
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    Post  TMA1 Wed May 22, 2024 7:13 am

    Indeed from what u see climate science is complex and yeah there seems to be some malicious elements with agendas. What disturbs me most are these NGOs and think tanks that, imo, seem to be using climate change as one of a few convenient means of pushing austerity measures for the western world. Highly manipulative if my cynical assumptions and others on this are right.

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    Post  kvs Thu May 23, 2024 1:33 am

    It is the usual use of "moral authority" for ass rape. In the name of saving the planet you will be made to eat bugs and live in a hive.
    You will own nothing and be happy. Meanwhile the elites will fly around in jets to various junkets producing thousands of time more CO2
    than you ever will.

    NATzO uses "moral authority" to engage in regime change and wars enabling separatists (e.g. Kosovo) and then shrieks with the same
    "moral authority" that Russia is violating Ukraine's precious territorial integrity.

    Just like my dear Kanadian leader was not qualified and legally justified to force a vax on me, none of these clowns, whoring for the
    elites, have any real authority moral or legal to use climate change to make me into chattel.

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    Post  kvs Mon Jun 03, 2024 1:03 pm



    I don't watch this YouTuber much because his smugness is annoying.   Anyway, we see the failure of thought in astrophysics in this video.   Lots of claims about
    being able to determine distances and times simply based on the magic of the red-shift.

    1) There is an assumption that red-shift is only due to expansion of the space-time.

    2) There is an assumption that time-flow is constant from the Big Bang to now and this includes no variation of the speed of light.

    3) There is an assumption (more like lack of awareness) that light is not affected by gravitational wells.   Somehow when you measure light coming out of a galactic well,
    there is zero spectral impact.   This is not even true based on GR.   Light is red-shifted when leaving a massive body and blue-shifted when falling approaching it.   The
    event horizon of a black hole is an infinite blue/red-shift surface.

    The z=14 galaxy which is supposedly from a time 300 million years after the Big Bang requires us to believe that it managed to form in less than 300 million years.   This
    includes stellar formation and dynamic organization.   This may seem unclear, but it is nonsense.   You need very long times for the primordial Big Bang gas to collapse into
    heterogeneous clumps with enough mass to form stars.    Considering that the initial distribution is nearly isotropic and thus diffuse, this must take billions of years of
    gravity-organized flow.    

    GR is not the final word on gravity.  It is not a field theory and merely attributes gravitational action as a space-time curvature without even describing how matter-energy
    imposes this curvature.   Specifying a metric equation does not explain how this curvature arises.    Curving the time "coordinate" is absurd by itself since there is no time
    dimension.   The change in time-flow at different radii from a massive object is due to changes in the process evolution (for example slowing down of photons) and not because
    some dimension is being curved.   Escaping this vapid framework, one can ask if photon interaction with gravitons (which do not exist in GR) leaves photons unchanged.
    A more plausible theory is that photons slow down in gravitational wells (hence the slowing of clocks).   This would be consistent with a loss of energy.   Note that in GR
    there is only a slow-down of clocks as one approaches a massive object and there is no "rebound" zone where the clocks speed up.   So photons going through gravitational
    wells experience a net loss of energy.    They do not behave like massive objects.

    Real scientists have expressed serious questions about such observations before.   We simply do not understand what we are seeing.   Anyone pushing exact dates and distances
    is engaged in spreading of BS.   Theory comes after observations and not before.   But you see clowns using BS theories to "explain" observations.
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    Post  GarryB Mon Jun 03, 2024 2:54 pm

    The z=14 galaxy which is supposedly from a time 300 million years after the Big Bang requires us to believe that it managed to form in less than 300 million years. This
    includes stellar formation and dynamic organization. This may seem unclear, but it is nonsense. You need very long times for the primordial Big Bang gas to collapse into
    heterogeneous clumps with enough mass to form stars. Considering that the initial distribution is nearly isotropic and thus diffuse, this must take billions of years of
    gravity-organized flow.

    My understanding is that galaxies and stars can't form until the hydrogen gas clouds they are formed from become super cold to allow they to get close enough to create enough gravity to create the runaway gravity effect that forms bodies like stars and planets.

    If you knew what you were doing it wouldn't take long, but as it is hit and miss random luck stuff it is going to take a very long time.

    The thing with science is that observations are used to reject theories and try to formulate newer theories that better describe what is observed. First of all these observations need to be repeatable and not just a result of a bad set of data or unfortunate time or view or simply not just erroneous data.

    Personally my problem with the whole big bang thing is that if everything was compressed to the size of an electron and then the entire universe bursts forth... shouldn't that have instantly resulted in an enormous black hole forming with all that mass located in such a small place... yet we are told with the big bang theory it expanded at an eye watering rate... like faster than the speed of light would travel...

    We consider spacetime to be a fabric and assume a black hole is a hole or tear in that fabric, but what if it cannot be torn or ripped... what if in the centre of a black hole is all the material that has ever entered the black hole... a neutron star, we think has all the empty space removed between atoms and atomic particles to the point where electrons and protons are crushed together to form Neutrons... but in a black hole in the singularity we don't know if gravity can reach infinity... whether that is even possible or not... we have decided that absolute zero is a thing and that it cannot get any colder than absolute zero in this universe, but is there an upper temperature limit? It seems there must be because the very idea that temperature could keep getting hotter and hotter would suggest that most materials would turn to plasma but as it gets hotter still will those sub atomic particles break down into what they are made from?

    Is the centre of a black hole a point of infinite gravity that crushes things out of this universe, or is it a point of very high gravity and very high temperature and reverts matter into energy... there is no real way of checking of course because it all happens safely hidden from this universe by the event horizon.

    This would have implications on the end of the universe because if the fabric of space time cannot be ripped... only stretched... will it get to a point where it rebounds back and collapses.

    Of course the entire mass of the universe just after the big bang is about as much energy and mass as you are going to get... because although energy is conserved mass can be consumed to create energy but energy generally does not create more matter as far as I am away... fusion and fission reactions consume matter to create enormous amounts of energy but huge amounts of energy does not create matter AFAIK.

    Maybe the Big Bang was the energy from all the black holes that were created from another universe... or even this one... when time ends the energy from all the cores of the black holes is transmitted to the start of spacetime to create a new big bang and start everything all over again... sort of like a massive slinky going down stairs... when it reaches the bottom gravity is reversed and it is at the top again to start all over.

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    Post  kvs Mon Jun 03, 2024 3:56 pm

    Yes, observations are supposed to test theories and help us develop better ones.   However, in astrophysics there is a lot of circular reasoning.   Observations are
    not simple tests that stand on their own.   Theory is used to interpret them.   This is not a pedantic complaint, this is a show stopper since the theory supposedly
    being tested is providing the observations.   Thus it is not a real test and nothing but a circle-jerk.

    All of the claimed black hole observations are a demonstration of this nonsense.   There is no way to determine what these dark objects are.   Because they are
    not fluxing photons like stars, does not imply that they are singularities with event horizons.   Photons require nuclear chemistry to be produced by stars.   If this
    nuclear chemistry shuts down, then you do not get photons emitted.   What we are seeing can be super-dense (and rational) objects without any horizons and
    point singularities.   They may be emitting dark matter particles or other particles we cannot detect but that absence of photons means nothing.    They can be
    just cold dead objects that don't emit anything.   No law of physics requires them to collapse to some point.

    The often cited "Einstein's greatest blunder" in his introduction of a Lambda*g term in his equations (Lambda is the cosmological constant) is no such thing.  It
    is just a forcing term.   If we have an equation of the from

    E(g) = T

    where E are the nonlinear partial differentials specifying the Einstein tensor equation, g is the metric to be solved for and T is the stress-energy "tensor",
    then T can be specified as a functional of g (g is a function of the coordinate map and a function of a function is a functional).   So we can have

    T(g) = Tref - Lambda*g

    and then we get

    E(g) + Lambda*g = Tref.

    Big whoop.

    Einstein's real blunder was the specification of T itself.   It is a pseudo-tensor and not a real tensor, which is an issue already.   But the real problem is that
    T is chosen in a way that guarantees singularities since we can have a feedback where stronger gravity creates more curvature, which then drives more
    gravity.   A self-digging hole.   There was no empirical constraint for this choice.   None at all.   There are other choices that are perfectly consistent with
    the Newtonian gravity of the weak field limit.   These other choices, such as the one derived from the Yilmaz metric of the 1950s, do not form black holes.

    It is the abuse of the T "forcing" term that is the source of so much BS in astrophysics and cosmology.    The overhyped Oppenheimer an Snyder dust black
    hole solution from their 1939 paper assumes that T is independent of g.   This is ad hoc and not self-evidently physical.    A sane approach requires T to be
    a function of g and in a physical manner.   You can drive singularities in many dynamical systems with the specification of unphysical forcing (such as T
    in this case).    T has to be a functional of g since the space-time curvature will change the distribution of the stress-energy.  The event horizon is
    a real singular surface and not a "coordinate singularity" as claimed by clowns in true Orwellian fashion.   As it tries to form, the T(g) in its vicinity will act
    to dampen the formation.   This is based on the use of the perfect fluid T(g):

    T_ij = (rho + p/c^2) U_i U_j - p g_ij

    The key is the minus sign before the second term which acts to cancel out the first term as g_ij explodes at the horizon.   This minus sign is substituted with
    a plus sign in kosher GR for no particular reason.   It is there in the flat space limit:  https://en.wikipedia.org/wiki/Perfect_fluid

    Oppenheimer and Snyder attempt to get around the complexity by positing a dust collapse where the dust is like galaxies separate by lots of empty space.
    But that is a dirty trick that fails.   Even if we contrive such a scenario, there will still be radiation pressure as the galaxies are scrunched together so p =/= 0
    and even if it is tiny a large enough g will still act to offset the formation of an event horizon.  

    The Big Bang black hole is a paradox of the current theory.   I have seen hand waving that we do not know all the physics and we have the absurd hyperinflation
    epoch that is an obvious deus ex machina introduced to resolve serious conceptual problems with the Big Bang theory.   The most popular excuse for the lack of any
    black hole is that space-time itself is expanding and we do not have a mass system inside a space-time framework like in black hole formation.   This is just voodoo
    designed to confuse the layman and even "experts".   The space-time (i.e. metric) is determined by the matter-energy distribution.   So a point origin for the Big
    Bang would still imply a singular potential well around it.  It does not matter if the space-time is expanding, the matter-energy would be trapped at this point.  
    The whole expanding space-time solution:

    https://en.wikipedia.org/wiki/Friedmann%E2%80%93Lema%C3%AEtre%E2%80%93Robertson%E2%80%93Walker_metric

    does not involve a point origin anyway.   The clowns who push this garbage just run the system in reverse and hypothesize that there was a point origin.   But that
    is simply false since any solution with a point mass distribution requires specification of such a point mass.   Then, you run the system forward.   This is the same
    BS as with black holes.   No black hole metric ever specifies a point mass at the origin.   It solves the T=0 equations and fits them to Newton's solution at infinite radius
    from the supposed location of the mass.  

    There is way too much bait and switch and con-man sleight of hand in this field for it to be considered honest.   Objectivity is not interested in people's ego driven
    intellectual masturbation.   The use of the term "coordinate singularity" to fob off the event horizon tells you everything about the rotten nature of this field.   None
    of the sources that use this term even point out that it is a redefinition of the mathematical term.   The coordinate map (spherical coordinates) used for the
    Schwarzschild (really Hilbert) solution for the metric is manifestly non-singular around any horizon.   The singularity in the metric at the horizon comes from the
    solution of Einstein's equations.   These clowns have a deep psychological problem with this surface singularity and have a rabid compulsion to pretend it is not there
    and instead there is some point mass singularity only at the origin.

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    Post  kvs Mon Jun 03, 2024 8:40 pm

    The point about emergence of stars and galaxies really needs to be emphasized. The Big Bang may have generated primordial "black holes" but even its true believers admit that
    the mass distribution was essentially homogeneous. Stars were not baked into the cake. Supposedly the Sun took 50 million years to form. But it started from a
    pre-conditioned "gas cloud" that was much more compact than any you would get right after the Big Bang, for example at 150 million years after the onset. It is not how
    fast the stars could coalesce but how fast the gas clouds could form. A diffuse distribution takes a bloody long time to clump under gravity. It is the early stage that is
    the longest since that is when the gravity is the weakest.

    The hyperinflation epoch is what would guarantee a diffuse distribution. The mind numbing expansion of space-time would act directly to disperse it. If there was differential
    expansion of space and the matter-energy then you could have clumping and the mother of all black holes. But the cosmologists/astrophysicists are the ones that are pushing
    the idea of inflation that includes matter-energy.

    Smell the Ptolemaic Epicycles. Theories that invoke fixes to prop them up are crap. The most rational course is to dismiss hyperinflation and to extend the age of the universe.
    This kills at least two birds with one stone and even pleases Occam. No ad hoc expansion without physical explanation and plenty of time for clumping of matter-energy into
    stars and galaxies. So the timelines you see claimed from 14 billion years ago are BS. What is claimed to be a one billion year window (when the Milky Way initially formed,
    for example) after the Big Bang is likely to be dozens of billions of years. All the extrapolation from current conditions is nonsense and not backed up with any proof or plausible
    physical reasoning. Like the standard cosmology metric which purports to support a Big Bang but which has no matter-energy distribution consistent with a Big Bang.
    Boundary conditions are not optional in mathematics and physics. But "physicists" pretend that you don't need them.

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    Post  GarryB Tue Jun 04, 2024 4:58 am

    Not just a diffuse cloud... but also a very cold one because we are talking about a gas cloud of basically hydrogen, so we can assume that the original makeup of the universe was subatomic particles and without fusion all the neutrons and protons and electrons could form would be hydrogen as the super heated plasma soup expanded and cooled.

    Hydrogen does not collapse and form a gas cloud under gravity on earth so in the middle of empty space getting it to clump together would require temperatures very close to absolute zero where the energies of the particles is so low they can't keep apart and bouncing.

    I am always suspicious of constants being added to formulas... it suggests the formula was not right in the first place.

    My pet hate is Pi... the ratio of a circle and is diameter... it just sounds like you made up a formula to explain something you didn't understand and so using a constant you fixed the results it generated to match what you observed.

    The problem is that often there is no way to check the observation manually so we all just assume it is right or close to right.

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    Post  kvs Tue Jun 04, 2024 3:07 pm

    Einstein was playing around with different versions of his equations because he was also into cosmology. The specific value for the cosmological constant was "determined" later
    to fit the Big Bang narrative. Just specifying a "damping" type forcing term of the form -Lambda*g is not precluded and depends on the physical problem being considered.
    For example, in atmospheric dynamics the the zonally averaged momentum equations (that determine the meridional circulation components) can have "Rayleigh forcing" terms
    on the right hand side that represent the action of dissipating Rossby and inertia-gravity waves. They have the form -r*u. These are approximations to the actual forcing
    that is produced by dissipating waves but they are not wrong and not post hoc fixes. In the case of GR, the stress-energy is a forcing term and can have various characteristics.
    So there is some flexibility.

    But as I posted above, the form of the stress-energy pseudo-tensor has serious conceptual issues aside from any other characteristics that depend on a particular system being
    considered.

    http://www.efieldtheory.com/docs/manuscripts/eFTC-240501.pdf

    The work of Leblanc cleans up a lot of the mess in GR. It looks like a real strong-field-limit capable theory of gravity. The original GR was only matched to Newtonian results,
    which are the weak field limit.








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    Post  kvs Wed Jun 05, 2024 7:53 pm



    The book keeping theory known as the Standard Model is having budget tracking problems.

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    Post  kvs Sat Jun 08, 2024 6:17 pm



    Special relativity without the voodoo.

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    Post  GarryB Tue Jun 18, 2024 1:29 pm

    Hole
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    Post  Hole Fri Jun 21, 2024 8:43 pm

    We don't know, and Russians won't tell
    Warp Drive  lol1

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    Post  kvs Sat Jun 22, 2024 12:18 am

    My personal favourite is teleportation. Portals, wormholes, whatever.

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    Post  Big_Gazza Sat Jun 22, 2024 4:19 pm

    IMHO the true game changer will be whether a reactionless drive is possible, ie generating some kind of field that can interact with the fabric of space (or with gravity) such that a resultant force vector can be generated to exert thrust.

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    Post  GarryB Sun Jun 23, 2024 6:17 am

    Well something like discovering how gravity works... is it a field or an emission or is it just the shape of spacetime... if you can work out how to cancel it things would float without propulsion and if you could actually reverse its effect you could use earths gravity to leave the surface and get into space, and then use the gravity of other items to accelerate away in any direction you please... approaching the sun on a slightly offset angle and massively increase the gravity of the sun would make you accelerate all the way towards the sun, then turn off the gravity the sun is using to pull you closer and reverse it so it pushes you away as you blow past it for a true slingshot acceleration.

    Important factors include that if you can turn off gravity then your mass does not matter so you can carry a big powerful nuclear reactor to provide energy so if you make a mistake and end up in the middle of no where where the gravity effects of things like Jupiter and the sun are tiny meaning very slow acceleration, you could use an ion propulsion... but even then you could use your gravity engine to massively increase the weight of the ion material as it leaves the ion engine massively increasing the thrust it generates.

    It also means filming on spaceships will be more like Star trek than like on the ISS...


    My personal favourite is teleportation.

    Actually I think teleportation is stupid. The energy and detailed mapping of an object needed to create a copy of it and then obliterating it and transmitting the atoms and then reassembling it somewhere else... it would simply be more energy efficient to send the data electronically and for them to clone you at the destination with atoms they have on hand.

    Plus when an enemy ship raises shields, why not teleport a atoms mixed together... side by side... electrons and positrons... all materialising together so they annihilate each other nicely as opposed to teleporting a lump of anti matter that might come into contact with matter dust particles to create a small explosion that blows the rest of the antimatter away from the intended target...

    If things can't be teleported around things then how do they teleport into buildings?


    Last edited by GarryB on Mon Jun 24, 2024 2:12 am; edited 1 time in total

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    Post  Big_Gazza Sun Jun 23, 2024 4:05 pm

    GarryB wrote:Well something like discovering how gravity works... is it a field or an emission or is it just the shape of spacetime... if you can work out how to cancel it things would float without propulsion and if you could actually reverse its effect you could use earths gravity to leave the surface and get into space, and then use the gravity of other items to accelerate away in any direction you please... approaching the sun on a slightly offset angle and massively increase the gravity of the sun would make you accelerate all the way towards the sun, then turn off the gravity the sun is using to pull you closer and reverse it so it pushes you away as you blow past it for a true slingshot acceleration.

    Important factors include that if you can turn off gravity then your mass does not matter so you can carry a big powerful nuclear reactor to provide energy so if you make a mistake and end up in the middle of no where where the gravity effects of things like Jupiter and the sun are tiny meaning very slow acceleration, you could use an ion propulsion... but even then you could use your gravity engine to massively increase the weight of the ion material as it leaves the ion engine massively increasing the thrust it generates.

    It also means filming on spaceships will be more like Star trek than like on the ISS...

    The concept of spacetime being a curved surface deformed by the presence of mass is a model which helps us visualise the concept, but AFAIK its true nature is still unclear (but I'm just an engineer, not a physicist, so what do I know  dunno ).  Neutrinos don't interact with the Higgs Field so are massless.  What properties make them so special?  I can't help thinking that if a way can be found to develop an energy field of some kind that can change the degree in which massive particles interact with the Higgs Field then the effective mass of a spacecraft within that region of influence could be reduced and permit "conventional" propulsion to achieve much higher acceleration rates for a given level of thrust.

    Star Trekky? Sure, but in terms of revealing the true nature of reality I think that we are still like cave men discovering fire.  A lot remains to be revealed, and who knows where a full and detailed knowledge of the fundamentals of space and time might eventually lead us?

    We are very much Off Topic but its all the fault of kvs. He mentioned wormholes and triggered my inner-geek/autist. Razz

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    Post  kvs Sun Jun 23, 2024 9:39 pm

    Continuation of an OT thread from the Russian hypersonic subsection:

    The concept of spacetime being a curved surface deformed by the presence of mass is a model which helps us visualise the concept, but AFAIK its true nature is still unclear (but I'm just an engineer, not a physicist, so what do I know  dunno ).  Neutrinos don't interact with the Higgs Field so are massless.  What properties make them so special?  I can't help thinking that if a way can be found to develop an energy field of some kind that can change the degree in which massive particles interact with the Higgs Field then the effective mass of a spacecraft within that region of influence could be reduced and permit "conventional" propulsion to achieve much higher acceleration rates for a given level of thrust.

    Star Trekky? Sure, but in terms of revealing the true nature of reality I think that we are still like cave men discovering fire.  A lot remains to be revealed, and who knows where a full and detailed knowledge of the fundamentals of space and time might eventually lead us?

    We are very much Off Topic but its all the fault of kvs. He mentioned wormholes and triggered my inner-geek/autist. Razz

    Mea culpa, mea maxima culpa.

    I have been pushing space as a material entity angle for decades to anyone who would listen Smile

    Neutrinos are supposed to have a very small mass.

    https://www.scientificamerican.com/article/what-are-neutrinos-and-how-can-we-measure-their-mass/

    The Higgs fields is a claim and not a fact.   Observing some particle in a certain mass range in a collider does not establish this field as a fact.   Step back and think about it.
    We have the material entity known as space (time does not exist as a dimension) which should somehow be involved in mass and inertia.   But instead we have particle physics
    wankers yanking fields out of their asses to "give" particles mass.   These clowns have not the first clue where mass comes from and what it is.    Build a big collider, rinse and
    repeat.

    The phobia of space in the physics "mainstream" is surreal.   All sorts of BS is contrived and postulated that manages to avoid dealing with space as a field and having it be
    responsible for the speed of light and for both mass and inertia.

    Minkowski's space-time is a contrivance that has ended up corrupting physics understanding.   You see all sorts of clowns running around talking about time as an actual
    dimension.    Any set of dynamical equations will have solutions that can be mapped on a space-time graph.   This does not mean that the future and past coexist like the
    bright and dark side of the Moon.   Or Texas and New York.    You can move from one spatial coordinate to another.   Can you move back and forth in time?   No fecking way.
    The idea of a time-dimension is some sort of super-determinism.   Every particle is mapped out in an absolute way as to where it was and will be.   The space-time universe
    is a total block universe.    The notion that you could move along the time "dimension" automatically induces a 5th degree of freedom.   Now you need 5 dimensions to properly
    describe your 4 dimensional "space-time".  

    Occam's razor is endlessly invoked as a crutch argument.   But somehow it is never invoked to stop wasting time on 5 dimensional reality that can be handled with a 3 dimensional
    space that does not require a 4th dimension of time.    The time dimension is just a token construct.   Book keeping for solutions of dynamical system equations.

    GR takes the Minkowski BS and flies with it.   The "curvature" of the time "dimension" is just a formalism to encode acceleration.   Get rid of this curvature and GR has zero
    value as a theory of gravity.   I see "thinkers" on YouCrap ask how can gravity escape the event horizon.   Idiots.   GR does not have a causal process description of gravity.
    It is a set of nonlinear hyperbolic partial differential equations that solve for curved space-time manifold pieces via the metric.   For the Schwarzschild "point mass" problem
    (where no point mass is ever specified) there is a manifold piece inside the horizon and one outside the horizon and these are stitched together at the horizon.  

    A proper theory of gravity would be some sort of field theory where gravitons would be virtual exchange particle quanta.   Then you would have a process for gravity instead
    of metric nonsense.   It is really funny how GR and gravitons are often talked about in the same breath.   They have zero to do with each other.
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    Post  GarryB Yesterday at 1:22 am

    Light/photons don't have mass either, yet they are effected by the shape of spacetime... that is how gravitational lensing works where a galaxy can bend light and make things beyond it that are further away actually visible because the gravity of such a large mass magnifies what is behind and beyond it.

    Maybe the shape is spacetime but as that is made up of space and time perhaps gravity is relevant to one but not the other?

    If travelling at the speed of light is impossible for matter, which creates the event horizon around a particularly dense object, then surely travelling faster than the speed of light is also impossible which means the event horizon is not a bubble but is actually a layer that might reach all the way to the centre of the object.

    The idea of a singluarity is odd... is infinite gravity even possible... is infinite temperature possible?

    Infinite energy?

    Maybe gravity increases in a black hole to the point where matter is crushed to the point of reverting to energy that can occupy the same space which is why a large black hole that holds ten times more matter than a smaller black hole is not ten times bigger... and would be essentially empty unless it is actively feeding and there is matter between the event horizon and the point of immense gravity where the matter is destroyed and converted to energy... except when it is converted to energy then wouldn't it lose its gravity field/emission? Nothing can escape the event horizon so outside the black hole the rest of the universe is not aware that matter crossing the event horizon is no longer there, but inside once the matter reaches the point of high gravity where the rest of the matter converted to energy is crushed and converted to energy too.

    Except if it converts to energy it no longer generates gravity so the extremely curved space time stops being a point of immense but not infinite gravity so it would expand... but it wont expand faster than the speed of light so it will remain trapped inside the event horizon, meaning the gravity strength would reduce and be spread over the interior of the volume inside the EH, and be filled with energy... super hot, that might convert new matter entering the EH into energy too.

    If there was some way of distorting space time around a BH perhaps they could revert to white holes that spew out energy and spacetime...

    Interesting to think about... will move these posts not relevant to the thread to the physics thread.

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    Post  kvs Today at 1:07 pm

    You raise natural questions that the GR cult cannot answer.   They can hand-wave about point masses and singularities but they have no physical description of them.
    GR solutions are not physical descriptions of singularities.   GR utterly lacks any microscopic functionality.   Everything is just a metric of space-time curvature.   There
    are no "geometrons" (analogues of gravitons) for the metric "field".    People are confused by the math and are taught to worship it as divine insight when it is nothing more
    than intellectual masturbation.   Postulates, ansatzes, gedanken experiments (a total oxymoron, BTW) are vapid.    They are not a substitute for real empirical inference.

    That photons have no rest mass does not preclude them from interacting with gravity.   If there is a real gravitational field that produces real forces and not contrived distorted
    world lines (geodesics) that have acceleration without forces, then it is rather plausible that photons interact with gravitons.   They do not have to emit gravitons themselves,
    but the can still interact with them.   Gravitons are likely to have masses and self-interact.   Gravity is likely a nonlinear field theory (somewhat like the strong force) and we
    do not have absolute Newtonian behaviour.   Nonlinearity can account for BS like "dark matter" because it introduces MOND (*) type deviations from the 1/r^2 power law you see
    in electromagnetism.   In electromagnetism virtual exchange particles (photons) do not self interact and it is a linear theory.    GR only fits Newton's theory and makes precisely
    zero contribution to explaining strong-field limit gravity which is most likely nonlinear.    That is why the whole black hole singularity BS is so absurd.   You start with matching
    a curved space-time formalism in the weak field limit and then expect it to have predictive power in the strong field limit without any explicit effort to introduce such information.
    It is just supposed to happen like magic.

    So a photon can see gravitons like particles.   The term "virtual particle" is misleading since it insinuates that field exchange particles don't exist.   But they do and are quanta
    of the field.  The difference is that these quanta do not have persistence like "real" particles.    The analogy in the classical realm is the circulation around a vacuum cleaner
    intake.   It satisfies an elliptic (non-local) type of governing equation even though fluids are described by hyperbolic equations.   There is an ongoing adjustment process where
    acoustic waves redistribute mass and pressure to produce an organized flow field.   Gravitons and virtual photons are like the quantized versions of these acoustic waves.   BTW,
    the atmosphere is also subject to adjustment organization.   It is know as geostrophic adjustment and gives us a relationship between the winds and the so-called geopotential.
    The waves involved in geostrophic adjustment are inertia-gravitational (buoyancy) type instead of acoustic ones.   These waves are large and feel the Coriolis torque.

    My guess is that the asymmetric nature of photon-graviton interaction is what gives us the red shift.   Photons cannot behave exactly like massive objects in gravitational wells
    because they have no rest mass and do not emit gravitons.   But they still interact with gravitons.   Massive objects experience no net scalar momentum change when they
    traverse gravitational wells assuming that they are not trapped in closed orbits.   Applying this logic to photons gives us the notion that they would experience no net energy
    change when they go through gravitational wells.   This is just a BS assumption and not empirical fact or reasonable inference.  

    Quasars are a good indication that the existing dogma on red shift is BS.   If the red shift is all due to the expansion of space-time in the Big Bang model, then there should be
    no special extra red shift from quasars unless they are very old.   So only age (and hence distance) of an emission source determines red shift.   But quasars have high red shift
    and are not automatically very old.   But they are supposed to have deep gravitational potential wells (and very large central black holes).   It is bizarre how red shift is never
    attributed to photons escaping gravitational wells even though GR itself predicts such an effect.   They keep yammering about expansion of space-time.   Anyway, light traversing
    such wells and being emitted in such wells is not going to have zero red-shift.  

    GR has the "paradox" that a charged particle is not supposed to emit any radiation in free fall since it is following geodesic (world line) motion.  This would be a direct test of
    the validity of GR formalism.  Unfortunately we cannot measure this radiation in a simple test in a vacuum chamber because it would require an enormous charge (e * 10^40)
    so we will have angels on the head of a pin arguments instead.

    (*) In spite of what clickbait YouCrap content creators claim, MOND has not been debunked.   Galactic rotation curve surveys do not constrain exact 1/r^2 power law behaviour
    for gravity.  Scientific papers are a dime a dozen.   One crop claims this, another crop claims that.   I posted on this before about the much distributed reconstructed image of
    the M87 "black hole".   The donut pattern was a processing artifact as demonstrated by another paper that tried to reproduce the analysis.

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