I wrote about Swiss astronomer Fritz Zwicky earlier in the thread.
"Zwicky noticed something odd about the Coma cluster of galaxies. The stars on the edges of the cluster were revolving much faster than could be explained by his estimate of the mass of visible matter in the cluster. He calculated that there was about four hundred times more mass in the Corona cluster than could be accounted for."
His observations weren't taken seriously till 1970 when American astronomer Vera Rubin mapped out the rotational velocities of the stars in the Andromeda galaxy.
"Zwicky noticed something odd about the Coma cluster of galaxies. The stars on the edges of the cluster were revolving much faster than could be explained by his estimate of the mass of visible matter in the cluster. He calculated that there was about four hundred times more mass in the Corona cluster than could be accounted for."
His observations weren't taken seriously till 1970 when American astronomer Vera Rubin mapped out the rotational velocities of the stars in the Andromeda galaxy.
How do you discuss energy without invoking the concept of time?
This is serious question - I’m not trying to be provocative here.
Any thoughts?
This is serious question - I’m not trying to be provocative here.
Any thoughts?
If the intergalactic universe is expanding faster the inside the galaxy the result will be everything will be pushed into the blackhole. Causing the edge of the galaxy to rotate faster.
Think about it.
Think about it.
Black holes are really nothing other than a prediction from equations. Rather famous one in terms of all of their effects. Proof is rather difficult.
You postulated earlier in the thread that "time is an emergent property of entropy".
At that time I quoted Carlo Rovelli: "Believe it or not, the only law which distinguishes the past from the future is the Second Law of Thermodynamics, which states that the total entropy of a system can never decrease over time."
In simple terms, this means that time is fundamentally interrelated with heat.
Aren't we just going over old ground?
Perhaps the Department of Entropy has finally arrived at an answer?
I don't think we're covering old ground Galu. Understanding the connection between time and energy in the same way we understand energy and mass is key.
It's a subject (i.e. the nature of time) that IMV is simply not ever treated with enough rigor. The fact that leading TPs can't agree should be enough of a clue for us to say 'hang on a bit, what's going on here?'.
It's a subject (i.e. the nature of time) that IMV is simply not ever treated with enough rigor. The fact that leading TPs can't agree should be enough of a clue for us to say 'hang on a bit, what's going on here?'.
What happens to your active filter near a black hole? It probably doesn’t work as designed. The op amps would probably fail from the environmental stress, because they were not tested to 500,000 G.
Would the frequency response be off? Would you even care? Back here on the 3rd rock from the sun ( where you do care) the design equations for your filter still work perfectly.
It’s required for GPS to be accurate enough.
Back in the days of the moon landings they didn’t worry about one meter accuracy. They always had an engine to burn if they were a wee bit off course. In order keep your vehicle in its lane, however….
Even if time, energy and momentum as we know them were to totally break down somewhere out there and even relativistic corrections won’t work, that doesn’t change the fact that simple forms of the equations in terms of t will continue to work as they always did, right here.
Back in the days of the moon landings they didn’t worry about one meter accuracy. They always had an engine to burn if they were a wee bit off course. In order keep your vehicle in its lane, however….
Even if time, energy and momentum as we know them were to totally break down somewhere out there and even relativistic corrections won’t work, that doesn’t change the fact that simple forms of the equations in terms of t will continue to work as they always did, right here.
Good summary of entropy in this wiki article
https://en.m.wikipedia.org/wiki/Entropy
Entropy only makes sense if you consider it with time. If you were able ‘stop the clock’ there would be no entropy. If I am able to observe a glass of hot water moving at c wrt me, the water would not cool - no time, no entropy. However, for anyone travelling with the glass of hot water at c, time would pass by quite normally.
So entropy cannot be reversed, but it can be halted for a stationary observer monitoring an object moving at c.
SH on entropy here (seems it’s another subject in physics in which a lot of professional academics have differing views)
https://en.m.wikipedia.org/wiki/Entropy
Entropy only makes sense if you consider it with time. If you were able ‘stop the clock’ there would be no entropy. If I am able to observe a glass of hot water moving at c wrt me, the water would not cool - no time, no entropy. However, for anyone travelling with the glass of hot water at c, time would pass by quite normally.
So entropy cannot be reversed, but it can be halted for a stationary observer monitoring an object moving at c.
SH on entropy here (seems it’s another subject in physics in which a lot of professional academics have differing views)
SH does talk a certain amount of crap though (though that's mostly when she moves off of physics!) -- but a lot of her peers do not always agree with her as you say...