http://wtc.nist.gov/pubs/factsheets/faqs_8_2006.htm This is the NIST faq the quote is question 11. It's been shown that normal office material would fall off the molten aluminum.
http://www.youtube.com/watch?v=ezIU6ZxYU3A&NR=1
http://www.youtube.com/watch?v=5d5iIoCiI8g
As far as the building...no there should have been a jolt. That cup example is horrible and you know that. To think that those amount of floors would go through one without any deceleration, as I would stepping on a cup, is just not true. That's the keyword no deceleration, it was constant and uniform acceleration. It is even worse in the north tower hardly any tilt essentially column on column and much less mass for the top block.
NIST concluded that the source of the molten material was aluminum alloys from the aircraft, since these are known to melt between 475 degrees Celsius and 640 degrees Celsius (depending on the particular alloy), well below the expected temperatures (about 1,000 degrees Celsius) in the vicinity of the fires. Aluminum is not expected to ignite at normal fire temperatures and there is no visual indication that the material flowing from the tower was burning.
Pure liquid aluminum would be expected to appear silvery. However, the molten metal was very likely mixed with large amounts of hot, partially burned, solid organic materials (e.g., furniture, carpets, partitions and computers) which can display an orange glow, much like logs burning in a fireplace. The apparent color also would have been affected by slag formation on the surface.
So you were wrong then. NIST clearly states that contaminants in the miz would be burning.
You were also wrong about pure aluminum as NIST points out the plane was aluminum alloy.
In addition, NIST indicates that there would be a slag on the surface of the material which according to you would include other contaminants.
Good on ya for debunking yourself, thank you.
The cup example is one in which the effect is exaggerated by the greater difference between force required to crush and force applied. The principle is the same, it too bad you cannot recognize that. In the case of the impact of upper towwer mass on the floor pans of the lowers section the dynamic force lower limit is approx 10X that which could be expected to be transferred via the trusses to the columns. LOWER LIMIT!
You also seem to have completely missed the fact that in BOTH towers the columns are NOT aligned at collapse initiation. They cannot be unless one is doing a Verniage type severing of columns and that is not in evidence nor supported by either side of this debate.
After collapse initiation the falling mass will primarily impinge upon the floor pans, in both towers. Having failed that floor pan the material then continues and unless it had come to a complete stop before failing the first floor pan it will now hit the next floor pan at greater velocity (simple high school physics that any science researcher would understand, even biologists) AND include the mass of the first failed floor minus any debris that exited to the side. To slow the collapse enough material would have to exit to the sides to offset the greater dynamic force cuased by increased velocity and increase in falling mass.
The vast majority of debris that fell outside the footprint of the towers consisted of lightweight/less dense material and material that began near, or at, the perimeter indicating that a great deal of that mass did remain inside to collapse floor pans.
BTW IIRC femr's calculations show that the acelleration was not uniform and constant but that it did vary.
Indeed even with a controlled demolition there is no way to have absolute uniform and constant acelleration unless one blows columns at all levels at the same time. Obviously that did not happen.