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Originally posted by bsbray11
There is not much factual about the "official story," especially the conclusions of NIST.
NIST's argument, boiled down to its core, is that the floor trusses were heated sufficiently by the fires and failed. They offer absolutely no evidence for this but some pictures of columns buckling from what they ascribe to heat. They even fail to show the number of buckled columns it would require for collapse to initiate, falling short by quite a significant number.
Also note that it is impossible to tell whether or not the trusses were sufficiently heated, because they were out of sight, and thus one can not determine whether or not they were glowing (indicative of heating above 400 C). NIST found absolutely no evidence of any heating above 250 C in their samples, and they only found a couple columns that even reached that temperature.
You can look through the NIST Report and dig out as much information as you'd like, but there are no real facts to back up most, if not all, of the official story.
Read my signature. That's basically what it comes down to here.
Originally posted by Stateofgrace
I could go on but my point is that even though I believe my make believe questions to be relevant they do not alter the fact that light travels at exactly 299,792,458 metres per second.
In the past, several scientists, among them British physicist Paul Dirac, have speculated that fundamental constants of physics evolve with time. According to Churchill, such changes might be coniiected with changes in the energy density of the vacuum. He points out, for instance, that the speed of light depends on the interaction between photons and the quantum vacuum which seethes with "virtual" particles popping in and out of existence. "if the energy density of the vacuum were greater in the past, the speed of light would be slightly different,"
However, the speed of light is not constant as it moves from medium to medium. When light enters a denser medium (like from air to glass) the speed and wavelength of the light wave decrease while the frequency stays the same. How much light slows down depends on the new medium's index of refraction, n. (The speed of light in a medium with index n is c/n.) The index of refraction is determined by the electric and magnetic properties of the medium. For air, n is 1.0003, for ice, n is 1.31, and for diamond, n is 2.417.
Originally posted by bsbray11
For WTC1, the top 13 floors collapsed downwards onto the remaining 97 (110 floors total). The top 13 floors were among the lightest, as they had to support the least weight structurally. The lower floors were heavier, besides also greatly outnumbering the top floors.
The block of the 13 top floors also disentegrated not too long into collapse, and the great majority of debris was lost over the sides of the building rather than falling straight down.
So basically, you have a relatively very small mass taking out a much larger mass, even when the initial mass breaks up completely and most of the falling debris is going right over the sides. So you're going on less and less mass to crush thicker and heavier floors all the way down.
Here's the killer given this info: the collapse kept a steady speed as it fell.
That pretty much says it all for me. The WTC Towers were not houses of cards, and stuff like that should not be physically possible without explosives.
Originally posted by Stateofgrace
Actually this is not strictly true, the towers were a stack of cards, offering up very little resistance to the dynamic load that bore down on it. Please try to imagine a tree.
Its core is solid, the towers were not, and in fact they were 95% air.
Applying this to the towers. I will look at WTC 1. This was hit between floors 92 and 98. It had 110 floors. Therefore above the crash site were some 12 floors. It was 1368 feet tall and weighted approx 500,000 ton
www.edgehill.ac.uk...
So from this each floor occupied 1368/110 which is approx 12.5 feet.
500,000/110 means that each floor weighed approx 4545 tons. (I’ll round this down to 4000).
(Please also note this does not include the weight of all the machinery that was on these floors)
Above the crash site was appox 12 floors which equals 48 thousand ton. This load was static. The building was designed and built to support the static loads of the floors above each other
After the plane crash and fire, all it would have taken was for one of the floors to collapse for this massive weight to become dynamic.
Irrespective of my figures which I know could be wrong, what is not wrong is that by the time this dynamic weight went through 12 floors it would have doubled in weight.
Another further 24 floors and it would have doubled again, in effect it would now be four times its original weight.
This weight was not constant it was getting heavier the further down the Tower it went.
Originally posted by ThatsJustWeird
So, do you have any proof of this. Just wondering.
Say you're able to sperate each floor. You're saying that floor 83 is heavier than floor 59?
Any evidence of this?
What everyone say was what was happening on the outside. We have no idea what was going on in the inside.
How do you know that was the floors that disentigrated and not the walls?
No, you have mass falling on to more mass causing that mass to collapse now that mass is part of the original and that continues, getting heavier and heavier and actually picking up speed as the collapse continues.
Why would it slow down?
An object at rest tends to stay at rest and an object in motion tends to stay in motion with the same speed and in the same direction unless acted upon by an unbalanced force.
Any collapse falls steady or speeds up.
Momentum added to the fact that buildings are mostly air so there's little resistance.
Actually the way they collapsed is how I know for sure that explosives weren't used. If explosives were used there's no possible way they could have collapsed the way they did.
1. No one places explosives at the tops of buildings. Any explosvies would have been placed at the base, and the building would have collapsed from the ground up.
2. It takes weeks to study and set up those explosives which would have been numourus. There's absolutely NO WAY anyone could have hidden that.
3. How did the explosives survive the planes crashing, the planes exploding, and the fires?
Originally posted by ThatsJustWeird
Did you even bother reading the links?
Originally posted by bsbray11
I've seen a lot of links. I've seen the BBC suggest the Towers had a single concrete column in each of their cores. Argue on behalf of these sites; I'm not obligated to review them for you.
But either way, do you get what I'm saying here? The top floors were the LIGHTEST. Falling onto the HEAVIEST. And outnumbered severely, 97 to 13. And the top floors disentegrated and the collapse continued at the same pace. Sorry dude, but this is physically impossible without explosives. There would be at least SOME resistance when the freaking floors disentegrated and there was nothing but falling dissociated debris. What do you think caused the top floors to fall apart in the first place?! Resistance
(A) You don't specify what this force would have been, or, more importantly, the amount of force that would've been required for global collapse. Keep in mind lots of energy is lost to heat, powderizing concrete (huge loss of energy right there), etc.
(B) You don't specify what integrity loss would have been required for a single floor to collapse
(C) You don't explain how this resulted in global collapse, especially the way I just laid it out for you.
(D) Any numbers are arbitrary and useless here unless compared directly to the amount of potential energy they would've been crashing into. What you need to find is the impulse, for each and every floor collapsed
Would this be in a vacuum or what? You're totally ignoring hundreds of thousands of tons of steel and concrete in these figures, dude. Those are kind of important
No it was not. The vast majority of debris was lost to the sides of the collapse. Watch a video, and look at pics from the air of Ground Zero. Most of the debris is scattered all over Ground Zero, as it landed from being launched outwards from the falling towers. Mass falling to the sides does not add weight to the falling mass.
Also keep in mind that dissociated pieces of debris, like steel beams and especially *powdered concrete*, do not have the same force as the same materials acting as a single body. Big difference here with deflection and etc.
All of the information you subsequently post on such assumptions is just as fundamentally flawed
Originally posted by ThatsJustWeird
This was no ordinary fire.
This was a fire as a result of an explosion.
The explosions were a result of planes crashing into the buildings.
If you can show me a case where that has happened before I'd love to see it.
Originally posted by Griff
So, a hydrocarbon fire is different in Rove world huh? Fancy that. You do know that jet fuel is basically kerosene right?
en.wikipedia.org...
Now, there have been fires in skyscrapers before. The Hotel Meridien in Philadelphia had a fire, but it didn't do this kind of damage. The real damage in the World Trade Center resulted from the size of the fire. Each floor was about an acre, and the fire covered the whole floor within a few seconds. Ordinarily, it would take a lot longer. If, say, I have an acre of property, and I start a brushfire in one corner, it might take an hour, even with a good wind, to go from one corner and start burning the other corner.
That's what the designers of the World Trade Center were designing for—a fire that starts in a wastepaper basket, for instance. By the time it gets to the far corner of the building, it has already burned up all the fuel that was back at the point of origin. So the beams where it started have already started to cool down and regain their strength before you start to weaken the ones on the other side.
On September 11th, the whole floor was damaged all at once, and that's really the cause of the World Trade Center collapse. There was so much fuel spread so quickly that the entire floor got weakened all at once, whereas in a normal fire, people should not think that if there's a fire in a high-rise building that the building will come crashing down. This was a very unusual situation, in which someone dumped 10,000 gallons of jet fuel in an instant.
Originally posted by ThatsJustWeird
Hillarious and typical bsbray
You people claim you're searching for the "truth" but you're really not. You're only looking for stuff that supports your conspiricies and theories. Expert opinion? Eh, who needs experts when you have actors! Actors and people who create anti-government conspiricy websites surely know more than engineers and experts right?
Originally posted by ThatsJustWeird
Now, there have been fires in skyscrapers before. The Hotel Meridien in Philadelphia had a fire, but it didn't do this kind of damage. The real damage in the World Trade Center resulted from the size of the fire. Each floor was about an acre, and the fire covered the whole floor within a few seconds. Ordinarily, it would take a lot longer. If, say, I have an acre of property, and I start a brushfire in one corner, it might take an hour, even with a good wind, to go from one corner and start burning the other corner.