Ask a physicist anything. (8)

Justatruthseeker said:

And yet here you are, claiming galaxies were further apart in the past, then they are in the present????? Since the further into the past we look, the further apart they are, but the closer we get to the present, the closer they are, but still everything is expanding apart and has been since the beginning?????

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If you actually understood the metric expansion of space, you wouldn't make such an inane comment.

The galaxies are not closer together in the past because their comoving distance is the same irrespective of expansion.

This is not surprising, given the observer is also comoving.
This is also consistent with galaxies being in fixed positions in space, despite space expanding.

If galaxies were closer together in the past relative to the observer, it would mean the galaxies must have moved in space.

'Tis your misconceptions and subsequent strawmen which cause the inconsistencies you are attempting to raise. There are no inconsistencies as far as the Standard Cosmological Model is concerned.

What's an even bigger joke is that Justatruthseeker even linked to the Wiki page on the Metric Expansion of space in his inaugural opening post of his monumental failure thread at Cosmoquest entitled: 'Expansion Of Space'.

If he'd read (and understood) that page, then my previous post #821 wouldn't have been needed.

That he's already cited that Wiki page, also demonstrates why his previous comment (quoted in post #821) really is inane.

Elendur said:

...
Chandelier Projects Spooky Shadow Forest onto Walls «TwistedSifter

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Elendur said:

...
It'll be fun, I'll keep you up to date.

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An update of how I'm doing:
I've managed to reduce my to-do-list to a length of mere 9.

One bug, one design change and 7 'features'

I've attached two images of the bug in question. It's the recursion which fails to break a branch properly when a collision is detected. Which gives it that jumping property.

I've had great fun this far
http://twistedsifter.com/2013/05/chandelier-projects-shadow-forest-onto-walls-hilden-diaz/

Maxwell511 said:

This thread was split automatically after 1000 replies and this thread has been automatically created.
The old thread automatically closed is here: "Ask a physicist anything. (7)"

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What do you personally think of the idea of time branching?

Theologically this could be thought of as Ezekiel chapter 37 happening again and again and again and again.

What I have read of String Theory seems to imply that a Being composed of fundamental energy would indeed be capable of something this big.

"Although nature manifests four distinct forces, physicists believe that
each may be part of a smaller number of more primitive forces. At high energy, the electromagnetic and weak forces appear to merge into a single "electroweak" force. Some "grand unified theories" suggest that a further amalgamation takes place between the electroweak and strong forces at as yet unattained energies. The most ambitious unification schemes envisage an amalgamation of all four forces into a single "superforce" at ultra-high levels of energy."

...
​

...."The real burden in the next three centuries will not be the development of fancy mathematics, but the experimental testing of these ambitious theories. All current thinking about total unification assumes that the effects of linking all the forces and particles together will only become manifest at energies that are some trillion times greater than those currently attainable in particle accelerators. Probably we shall never reach such energies directly" ( A Theory of Everything" Volume 21 of "The World ofScience)

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SelfSim said:

What's an even bigger joke is that Justatruthseeker even linked to the Wiki page on the Metric Expansion of space in his inaugural opening post of his monumental failure thread at Cosmoquest entitled: 'Expansion Of Space'.

If he'd read (and understood) that page, then my previous post #821 wouldn't have been needed.

That he's already cited that Wiki page, also demonstrates why his previous comment (quoted in post #821) really is inane.

Click to expand...

But of course only if you ignore your own science, right?

Metre - Wikipedia, the free encyclopedia

"Since 1983, it has been defined as "the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.""

Only if you ignore experimental evidence, right?

Time dilation - Wikipedia, the free encyclopedia

"An accurate clock at rest with respect to one observer may be measured to tick at a different rate when compared to a second observer's own equally accurate clocks."

So experimental evidence shows the rate of a clocks ticks changes with energy. You then say the rulers shrink. But then you calculate the same distance in both frames, regardless that there is no choice but they are different.

So only if we ignore the very science we claim to follow, can we ever imply differently.

You don't know what science is, all you have is Fairie Dust. So brainwashed into believing Fairie Dust over science, you no longer know the difference.

What's inane is telling me rulers shrink, but then magically read the same distance in both frames, even if one is shorter than the other. That's the definition of inane for sure, ignoring your own science.

Go ahead, continue to ignore your own science you give lip service to.

Relativity of simultaneity - Wikipedia, the free encyclopedia

"In physics, the relativity of simultaneity is the concept that distant simultaneity – whether two spatially separated events occur at the same time – is not absolute, but depends on the observer's reference frame.

According to the special theory of relativity, it is impossible to say in an absolute sense that two distinct events occur at the same time if those events are separated in space."

It's impossible to say because absolute motion can not be determined, therefore the rate change of clocks can not be absolutely determined, nor the rate change of the length of the meter dependent on those rate changes in clocks.

Fairie Dust is what you preach, not science.

Justatruthseeker said:

But of course only if you ignore your own science, right? ... {snipped irrelevancies}..

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Ha .. ha .. ha! Hilarious!
...
Having proven the invalidity of your ideas at CQ, (by your having shown you have nothing of scientific value to your claims), and by getting yourself banned for never listening to anything or anyone, you then return and proceed to demonstrate exactly the same characteristics at CFs.

'Tis you who are deliberately ignoring the consistent explanation (presumably to satisfy your own ego and to convince yourself of your own, singular ideology).

Logical consistency is a fundamental empirical test for explanations in science .. (apparently not so in your distorted pseudoscience though) ...

SelfSim said:

Distant galaxies, free of gravitational influences from other galaxies, are being carried along with the Hubble flow, and are thus not moving through space, despite spatial expansion. They are in effect, moving with the expansion and no work is being performed.

Hence the KE energy of these galaxies, in their own frame of reference, is zero.
...
The galaxies are not closer together in the past because their comoving distance is the same irrespective of expansion.

This is not surprising, given the observer is also comoving.

This is also consistent with galaxies being in fixed positions in space, despite space expanding.

Click to expand...

Justatruthseeker said:

But of course only if you ignore your own science, right?

Metre - Wikipedia, the free encyclopedia

"Since 1983, it has been defined as "the length of the path travelled by light in vacuum during a time interval of 1/299,792,458 of a second.""

Only if you ignore experimental evidence, right?

Time dilation - Wikipedia, the free encyclopedia

"An accurate clock at rest with respect to one observer may be measured to tick at a different rate when compared to a second observer's own equally accurate clocks."

So experimental evidence shows the rate of a clocks ticks changes with energy. You then say the rulers shrink. But then you calculate the same distance in both frames, regardless that there is no choice but they are different.

So only if we ignore the very science we claim to follow, can we ever imply differently.

You don't know what science is, all you have is Fairie Dust. So brainwashed into believing Fairie Dust over science, you no longer know the difference.

What's inane is telling me rulers shrink, but then magically read the same distance in both frames, even if one is shorter than the other. That's the definition of inane for sure, ignoring your own science.

Go ahead, continue to ignore your own science you give lip service to.

Relativity of simultaneity - Wikipedia, the free encyclopedia

"In physics, the relativity of simultaneity is the concept that distant simultaneity – whether two spatially separated events occur at the same time – is not absolute, but depends on the observer's reference frame.

According to the special theory of relativity, it is impossible to say in an absolute sense that two distinct events occur at the same time if those events are separated in space."

It's impossible to say because absolute motion can not be determined, therefore the rate change of clocks can not be absolutely determined, nor the rate change of the length of the meter dependent on those rate changes in clocks.

Fairie Dust is what you preach, not science.

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Ok so from that, its crystal clear that you do not understand the difference between proper time and co-ordinate time, nor proper length and co-ordinate length.

The expansion of the universe can be measured by using proper distance, which does change with time, as opposed to comoving distance, which is constant. This is done by using photons as 'the measuring stick', given that the speed of light is invariant ... not only in inertial frames, but along geodesic paths.

So then, could you also please explain time dilation of supernova light curves (whose cause is explained in science by the expansion of space over the period of time required for their photons to reach the observer), using whatever your chosen 'alternative' universe mechanism is?

Can you also then please include in that, why time dilation of type IA supernova light curves happens to be non-existent for nearby galaxies? In doing so, please also include the explanations for the paradoxes which necessarily arise from any of your 'plasma universe' mechanisms.

... Let me go get the popcorn ... I'll sit back munching whilst you dither about ...

Elendur said:

An update of how I'm doing:
I've managed to reduce my to-do-list to a length of mere 9.

One bug, one design change and 7 'features'

I've attached two images of the bug in question. It's the recursion which fails to break a branch properly when a collision is detected. Which gives it that jumping property.

I've had great fun this far

Click to expand...

Omygosh!

This is so completely amazing!

What am I looking at though?

Zippy the Wonderslug said:

Omygosh!

This is so completely amazing!

What am I looking at though?

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The very primitive, first plots of the outer part of the branch.

It's not looking very similar since I'm still trying to get the foundation laid out for the branch. Eventually, it'll start to look like a branch, with splittings and more natural thinnings / curvatures.

When I'm done it'll be ready to be imported into any 3D software, including printing, and be easily changed to look better by hand.

The donut is just there as a base, since it serves to help with the bug fixing.

^ Any new progress on this?

I'm actually quite excited if you're still attempting to work on that design.

Zippy the Wonderslug said:

^ Any new progress on this?

I'm actually quite excited if you're still attempting to work on that design.

Click to expand...

Still working on it, I've improved the structure which holds the information about the branch, but I haven't repaired the collision detection yet, it's proving much harder than I had anticipated.

Aside from that, I've actually applied this to an invention contest (by advice of my father-in-law, who has quite a number of inventions under his belt) if I get anything, it'll go straight into the project.

Edit: Huh, I think I solved it thanks to your question. Awesome

If there is anything like painfully boring, repetitive, mundane work that needs to be done here, I wouldn't mind at all giving you a helping hand to cut down on your hours on this.

By the way, here's a project that came in first place at an art exhibit in Grand Rapids, Michigan.

Not even an hour from where I live.



This is actually a real life image.

Zippy the Wonderslug said:

If there is anything like painfully boring, repetitive, mundane work that needs to be done here, I wouldn't mind at all giving you a helping hand to cut down on your hours on this.

Click to expand...

Not really, not that I can identify at least. I'm quite (read entirely) new to actually producing on my own so I don't have any expectations of the work required other than the rough outlining.

By the way, here's a project that came in first place at an art exhibit in Grand Rapids, Michigan.

Not even an hour from where I live.

{Image}

This is actually a real life image.

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Very impressive! Feels a bit chapel-like.

Kinda physics, kinda law, kinda political, very weird question-
Lets say a spaceship comes to Earth. And they drop off a team or two here in the US.
And they have no documentation. Thus, illegal aliens.
How will they be dealt with? We can't deport them. Can we lock them up and justify it? Or is what we see in Hollywood real- they'll be sliced and diced and dissected to see what makes them tick?

David Jerome said:

What are the practical applications of quantum physics? How can this be used?

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Practical applications of quantum mechanics are everywhere that you look and in almost everything that you touch. Quantum mechanics was used to understand and thus create electronic devices and things like lasers which have a large number of applications such as laser eye surgery, laser surgery for disk problems, etc. Quantum mechanics is thus responsible for your LED monitor screen, your computer, your cell phone etc.

Hi again.

What are the odds of correctly guessing someone's Social Security number?

It has 9 digits.

I'm asking because someone claimed to have seen this in a dream.

Oh, and Elendur, I would love to see another screenshot of your work.

Zippy the Wonderslug said:

Hi again.

What are the odds of correctly guessing someone's Social Security number?

It has 9 digits.

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If the digits were all random, the probability of guessing correctly is 1 in 10^9, or one in a billion.

However, SS numbers are actually assigned according to some bizarre rules. For instance, since 1972, the first three numbers are the same as the first 3 digits of the ZIP code where the number was assigned. And some ZIP codes like 00200 don't exist.

So if you worked it harder, you could improve your odds quite a bit. If you know where the person lived when she was born, that gives you the ZIP, and it would leave 6 unknown digits for a 1 in a million shot. The other six digits follow some rules, but are closer to random, and it would be hard to improve your guess.

Cactus Jack said:

Kinda physics, kinda law, kinda political, very weird question-
Lets say a spaceship comes to Earth. And they drop off a team or two here in the US.
And they have no documentation. Thus, illegal aliens.
How will they be dealt with? We can't deport them. Can we lock them up and justify it? Or is what we see in Hollywood real- they'll be sliced and diced and dissected to see what makes them tick?

Click to expand...

Considering the technology to travel interstellar distances is far beyond anything we have now, any smart government would do their best to avoid antagonizing them and thus giving their friends a reason to pick a fight with earth.

Strathos said:

Considering the technology to travel interstellar distances is far beyond anything we have now, any smart government would do their best to avoid antagonizing them and thus giving their friends a reason to pick a fight with earth.

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Assuming governments would do the smart thing - which tends not to be supported by actual history.

Justatruthseeker said:

Assuming governments would do the smart thing - which tends not to be supported by actual history.

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Good point.