Everything posted by MigL
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Where to black holes end up?
The classically conserved quantity we associate with 'mass' is essentially encoded in the event horizon. As such it is a measure of the local space-time curvature. For all we know ( classically ) there is nothing inside a BH. Gravitational waves are only observable outside the event horizon, and any 'internal', if possible, would simply contribute to energy-momentum of the system, due to self interaction.
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Where to black holes end up?
Altering the configuration of a system will change its energy-momentum, resulting in a change in the local space-time 'curvature', and possible gravitational wave emission ? Is that not a causal relation ?
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Where to black holes end up?
To paraphrase the Merovingian ( in the Matrix ) ... "Cause and effect, my dear" Energy-momentum is the 'cause'; space-time curvature is the resulting 'effect'. This is true for any gravitating body, not just Black Holes. The difference is the causal disconnect of the space-time within the event horizon, and outside the event horizon.
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War Games: Russia Takes Ukraine, China Takes Taiwan. US Response?
You're in 'good' company.
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Gravity (split from A change in Gravity killed the dinosaurs!)
Any change in the arth's orbit, even a doubling of the orbital radius, would have minimal effect on the surface gravity of the Earth. The changes in climate, however would be catastrophic for life. And the mechanism for increasing the orbital radius, whether by impact or other means, would be even more catastrophic. Have you heard of Occam's razor or the KISS principle ?
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War Games: Russia Takes Ukraine, China Takes Taiwan. US Response?
You should be wrapping your head in aluminum foil ... You are going to great lengths to villify Ukrainians, and excuse the aggression that Russia has perpetrated on another sovereign country, with the feeble excuse that they are 'de-NAZIfying' the Ukraine. How many people need to die for the aggrandizement of one insecure person ? An you want to blame the victims in this ? I'm giving you the benefit of the doubt by assuming you're a foil-hat wearing conspiracy theorist, and not just anothe V Putin 'ball-licker'.
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Where to black holes end up?
I know the Kerr metric predicts a 'ring' singularity, but as far as 'passages' to other universes, I believe that's due to the possible connections of Penrose diagrams. Whether those connections represent possible realities is a different story, which I will not speculate on.
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Electromagnetic fields and the Big Bang
I'm sure we'll all regret it when you prove us wrong. With some EVIDENCE !
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Where to black holes end up?
The event horizon is a mathematical construct, which indicates a radius ( or radii ) after which certain effects manifest. Te rules and laws of GR continue to hold until infinities arise, close to the singularity; IOW no faster than light tavel. Te Shwazschild solution is a special case where infinities aise at the event horizon due to choice of co-ordinates. You may have misunderstood the fact that inside the event horizon, the only direction available is forward in time ( due to GR's geodesics, or geometry, terminating at the singularity, with no paths out of the EH ). A Big Bang arising from a 'white' hole connected to a Black Hole in an alternate universe is also a non-starter, as it would have observable differences to our universe, like a discernible center, or a 'rotation'.
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The ebb and flow of the light.
You don't understand stellar evolution ... You don't understand 'implosion' as it relates to stellar evolution ... You don't understand stellar formation ... You don't understand reflection from a 'rough' body ... You don't understand how much power our sun actually adiates ... You have no understanding of what a Black Hole is ... Any conclusions drawn from misunderstandings are, by definition, inaccurate. I suggest you get your information from sources other than Reader's Digest.
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Electromagnetic fields and the Big Bang
Even the Speculations forum requires evidence to be presented in support of your 'speculation'. Hand waving arguments are not sufficient. The electromagnetic force, as we know it, did not exist until 10-35 sec after the Big Bang started. Prior to that, it was a unified electroweak field where fermions like electrons, muons, neutrinos and quarks ( and some bosons like W and Z of the weak interaction ) were massless. The Higgs mechanism allowed these particles to gain the property of mass, and the evidence of the Higgs boson, detected at CERN a few years ago, allows for a high degee of confidence in this model. I'll be waiting for you to present evidence supporting your model.
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What is the smallest object with mass?
I don't know what you mean. Zero curvatue is flat space, with no gravity fields ( maybe global curvature, if any ), absent any energy-momentum that gives ise to curvature ( like a BH would )
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Mass and Energy-Momentum
Mass and energy are equivalent ( from E=mc2 ). As is momentum and energy ( from the same equation expanded to include massless particles )
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What is the smallest object with mass?
Yes . Tidal forces are a manifestaion of the degree of curvature. Large BHs have more 'gentle' curvature, lessened tidal forces, and you can pass through the event horizon without getting 'spaghettified'. For small BHs the tidal forces are much more extreme, and you should bring along tomato sauce and meatballs.
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The earth’s core (split from Does our moon affect Earth's core)
Again I'm at a loss to understand your meaning. Do you mean 'Has anybody touched it or seen it ?' then , of course not. But science is causal, and hings can be inferred by he effects they have on other hings. Science does not simply rely on the 5 primary senses; mostly it relies on your brain to recognize causal sructures that tell us how nature behaves. IOW start living and learning beyond your fingertips
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Berlin prepares large thermos for winter
It only has to store excess electricity generated by solar panels or windmills during he day, and is meant to offload drain on he grid. Not be the sole supply. And yes, at the household level batteries would be more efficient. ( but have you ever seen a Lithium fire when the batteries swell, crack and get wet ? )
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Where to black holes end up?
Both can be considered 'edges' of space-time, however, a Black Hole singularity ( ? ) is in the future, while the Big Bang singularity ( ? ) is in the past.
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The earth’s core (split from Does our moon affect Earth's core)
???? By 'we', do you mean you ?
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Berlin prepares large thermos for winter
What has been done is the 'creation' of hydraulic gravitational potential in the form of hydroelectric dams. My proposal would be for a hydroelectric 'battery', which stores electricity by raising water to a higher gravitational potential, and then re-extracting the electricity when the water drops back down through a turbine. It could be as simple as a rooftop tank, to store electricity generated during the day by solar panels, and to recoup at night when the panels are not active.
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Is the universe really 13.7 billion years old?
Have you not read any of the preceding posts ? Using the equations developed by Meghnad Saha in the 1920s, we can calculate the ionization state of a gas in thermal equilibrium from the temperature and pressure. All gases in the early universe ( mostly Hydrogen and Helium ) remained completely ionized down to a temperature of about 3000oK. In this state, the universe consisted of an opaque plasma, but once it expanded further, and dropped below this temperature, electrons were allowed to bond to nuclei to form atomic Hydrogen and Helium, rendering the universe transparent. We 'see' the glow of the opaque ionized plasma as the CMB radiation, but it is no longer at 3000oK, it is now at 2.7oK, a reduction of about 1040 times. We can then use your standard statistical thermodynamic gas laws, which relate temperature, volume and pressure, to conclude that the universe must have increased in volume by the equivalent factor of 1040 times, since the recombination era ( when atoms were able to form )
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Proposition: The underlying approach to their subjects by Physics and Mathematics are the antithesis of each other.
So, stop wasting your time, and posting in a topic that is boring, and doesn't interest you ...
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Berlin prepares large thermos for winter
I like my idea better ... Use 'excess' electricity, when available, to pump water to an elevated reservoir, then run the water down through turbines to generate electricity when there is demand. Although there are pumping/generating losses, the 'elevated' water can be stored indefinitely, and won't 'run out' after 13 hours.
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What is the smallest object with mass?
The event horizon of a Black Hole can be viewed as an extreme curvature of space-time. A classical Black Hole will conserve mass, angular momentum and charge. And, as mass is equivalent to energy, those conserved quantities contribute to energy-momentum which produces space-time curvature ( gravity ).
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Light has no mass because gravity and light travel at the same speed, true or false?
Is your claim supposed o follow from he equality ? I read that as energy is equivalent to mass; and don't see 'light' in that equation at all.
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US-Roe vs Wade overturned
While this is the Politics section, it is still a Science forum. We would be better off not dealing in hyperbole.