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Sources of the cloud dust and the aftermath
No masonry was used in the steel construction of the Twin Towers and therefore the mainly 4-inch light concrete floors (40,000 ft2 per floor), fireproofing (5,000 tons), insulation and interior dry walls were the main sources of the dust (Table 1). The initial dust cloud caused a horrendously high concentration of airborne particulate and combustion products, which was both extensive and unforgettable. Within minutes, the air pressure generated by the collapsing tower raised a dust cloud, which bellowed up over 1000 ft (see the American International Building, 70 Pine Street, with a tip height of 952 ft in Figure 2a). In a series of seven photographs taken from the Brooklyn College Campus (seven miles from Ground Zero) over the first eight minutes after the South Towerís collapse the extent of the mixing and the size of the dust cloud are readily apparent (Fig. 2a-g). On a crystal clear day with low wind it rapidly expands, in 8 minutes, to a size sufficient to obliterate any view of Lower Manhattan (Fig. 2g). The dust cloud moved down the street like a wall of volcanic ash (Fig. 3), reaching such a height that no skyscraper (several over 800-ft in height) was visible in Lower Manhattan. After five hours the dust had cleared sufficiently (Fig. 4) for the skyline to be partially visible again, although missing the two tallest and largest buildings in NYC. The mixing indicates the settled dust collected for our study, five days later at several locations more than 8 blocks from the WTC, should be representative of the stable particulate matter in the dust cloud.
Originally posted by jafo72
One final comment. Concrete always retains some trapped moisture. This from my son, a concrete company foreman whose company makes high rise concrete buildings. Is it possible that the concrete, suddenly intensely heated by the exploding fuel, be turned into powder by rapidly expanding steam from such moisture?
Is it possible that the concrete powder is the result of trapped steam? The grinding together of the falling pieces of conctete and steel would contribute powder as well. Just another thought!
Originally posted by Sauron
Billybob, you hit that nail one shot.
Sorry for all the pictures I'm a man of few words, and these pics, say more that I could ever try to write.
People have to wunder what kind on power did this below, please emember that this took place long after the planes hit the Towers.
Originally posted by SMR
Had bombs gone off before the planes hit, I think they would have to be doing some serious explaining to do dont you think?
How would they tell us that terrorists went into the building and placed explosives.It's one thing to drive a truck in with a bomb.But to explain how explosives went off before the planes hit,....they would have to come up with some way of saying somehow known terrorists walked into the buildings, placed explosives during business hours,,,,see where this is going?
Now some might say, well how about the claim of the explosives in the first place.
We know that it was not just five drills but at least 35 drills over at least two months before September 11th.Drills that many floors were emptied out for hours at a time.These drills were un-announced.
Originally posted by billybob
muaddib, if i was wrong about this, howard would have called me on it right away. his response to this is, "i don't agree with those calculations", not, "that is bad science".
Originally posted by billybob
i'll go through it again, because if you're going to continue all your super successful "debunking", LOL, you will need to understand this simple physics law. the law of conservation of energy.
Originally posted by billybob
the reason a tower all of a sudden falling all by itself would make no sound, and have no puff of smoke, is because 100% of the energy available would be converted from gravity into motion.
Originally posted by billybob
every time there is a crash, the energy to create that sound comes from the same source as the energy of collapse, ie. gravity.
Originally posted by billybob
AND THERE WAS MOLTEN STEEL IN THE BASEMENT FOR WEEKS AFTERWARDS(it takes a great deal of energy to melt steel), ......it would be like getting into a dodge viper with a gallon of gas in it, and driving at 160 mph from NY to LA.
Originally posted by billybob
there has to be a massive external source of energy to account for all the work that was done(work in the physics sense, my little messiah of dune).
Originally posted by billybob
do you understand the law of conservation of energy, now? because all the physicists in la la land understand it.
Originally posted by HowardRoark
Where did this air go when the towers collapsed?
The claim that the dust cloud represents anything other than the air displaced by the collapse is ridiculous.
Originally posted by SMR
Here we go again, insulting people when others dont buy into their lack of proof.
Was it really necessary to cal Billybob hillbilly boy ? Seems someone is getting angry when someone doesnt suscribe to their junk.
Lay off the insults Muaddib
Yeah, you're right they don't, because an implosion is done from the ground up to control the dust cloud. That's why the buildings fall like they do, because they cut the bottom out from under it. The WTC came down from the top down.
Even if the rest of the building wasn't compromised, the bottom of the building wasn't meant to stop tons and tons of building as it was falling in a downward motion. It was designed to support the building swaying in the wind, which would impart a SMALL amount of motion, and while it was standing. Once the inertia started the building falling downwards, the lower floors didn't have any way to stop the inertia of the fall.
It's one thing to support a non-moving building, and another to STOP several hundred tons once it's in motion, and for every floor it fell it fell faster, which would add more inertia to it, which would make it harder to stop.
Originally posted by wecomeinpeace
Originally posted by HowardRoark
Where did this air go when the towers collapsed?
The claim that the dust cloud represents anything other than the air displaced by the collapse is ridiculous.
I was in Taiwan in 1999 when a major earthquake occured. I was there at the scene of a 20-storey hotel in Taipei that collapsed. The top 16 floors collapsed on top of the bottom four floors. No pulverisation. No dust clouds. No explosive, parabolic jettisoning of glass, concrete and steel. No molten steel. No mysterious squibs. Steel beams mostly in tact. No pancaking, no flapjacking, and no maple syrup. The top section first collapsed straight downward partly crushing the lower floors and then fell over across the street breaking into large chunks, just as the top sections of the WTC towers would have if they had collapsed naturally in the first place. Why did this happen? Because the lower section held once the potential energy of the top part was spent. They rescued survivors from the building. Most of the magical air that you worship so much was still trapped in the building.
Originally posted by wecomeinpeace
Exactly. Finally someone is making some sense. WTC7 was conventional, bottom to top demolition, thus no dust clouds, only squibs as the main supports were blown out and the building collapsed in an instant. WTC1 & 2 were unconventional, top down demolition, thus the outward explosions and pulverisation.
Originally posted by wecomeinpeace
Yes, they did. It's called energy transferance. Every collision loses energy as it is transferred into heat, sound and lateral kinetic vectors. Momentum is transferred into the receiving object and whatever it is connected to (in this case, the Earth).
Originally posted by wecomeinpeace
No, it wouldn't. Energy is lost with each successive collision. If the weakened floors gave way, each successive floor hit below it would cause energy transferance and thus slow and finally stop the collapse.
The Law of Conservation of Energy
Energy in a system may take on various forms (e.g. kinetic, potential, heat, light). The law of conservation of energy states that energy may neither be created nor destroyed. Therefore the sum of all the energies in the system is a constant.