collapse

It seems many JREF members have faint ideas what strain energy is. This may explain many misunderstandings of the WTC destructions. So here we go: From NIST report - NISTNCSTAR1-6D chapter 5.2 - we learn: "The aircraft impacted the north wall of WTC 1 at 8:46 a.m. … between Floor 93 and Floor...

Bit of a spin off from R. Mackey's thread here. I'm wondering whether anybody with a head for numbers and some spare time would be interested in calculating some limiting cases for the progressive collapse of the twin towers. I know I'd be interested in the answer. To clarify, what I mean is...

Thought it could be interesting, the faculty of architectural engineering of my university caught fire this moring at 9:00 AM due to a electrical shorting. At 1:30 PM eyewitnesses (me included) heard an explosion that broke out several windows, then the fire department decided to pull back and...

That's what I'm looking for. I talking with some people about the collapse of the towers. The claim about no steel framed building ever collapsing due to fire is raised again. We've mentioned some of the examples, but a hard-core truther (with no engineering background in any form) pooh-poohs...

Im conversing with some CT's about the collapse times of the towers and their conjectures about conservation of momentum. They claim that the observed times are too short and the explanations from folks like Bazant, Greening, and our own Newton's Bit dont jibe with the laws of conservation of...

If "partial collapse" is POSSIBLE why is "complete collapse" IMPOSSIBLE? From my other thread: Truthers seem to acknowledge that it is fully reasonable for buildings to experience "partial collapses" due to fire. They even acknowledge this with regards to the Windsor building: This...

I went through an online course called "Physics for Future Presidents" (Instructor Richard Muller) in Fall 2006 and learned a lot. There was one lecture in which Muller talked about the events of 9/11. If you want to hear that, look here and view/listen to the lecture on 9/12 labeled "Gravity...

At this point we are already aware that many Truthers simply point to random anomalies without any regard for whether they support any plausible conspiracy. I've thought of another example of this kind of behavior to add to the existing pile: the "debris ejected hundreds of feet" argument...

Perhaps this belongs in Sizzler’s recent thread. While there’s some overlap, I didn’t find exactly what I’m looking for (maybe I didn't look hard enough). Nor is my theme quite the same. Unlike Sizzler, I’ll state at the outset I’m not a truther by any stretch of the imagination (see...

I have a guy that posted a comment on one of my Youtube videos that reads: "??? Huh ??? why is it redundant to figure out the exact events of the total collapse? If it wasn't free fall speed? Then what was the rate of descent and how do you explain it without an investigation of the events...

Okay, guys. You keep telling me how obvious it is that the WTC was destroyed in a controlled demolition and how everyone should think so just by looking at it. You say that the collapses "looked like controlled demolitions". Which begs the question: If the collapses on 9/11 "looked like...

I am soliciting opinions regarding some information that is new to me. I have asked for the conspiratorial POV elsewhere. The official reports for the time of the Pentagon collapse state that it collapsed at 09:57. Today I realized that in fact, it actually collapsed at 10:15. The summary...

A real "mass conspiracy" so to speak. Rather tedious reading, but constructive comments would be appreciated. Mass and Potential Energy of World Trade Center Tower 1

I don't know if this has been discussed before - Since the failure points in both towers were on the opposite side from the aircraft impact, the side with the most intense fires I began wondering if Oxygen generators in the aircraft debris fueled the fires. As the aircraft slid across the...

I was reading, as I am occasionally wont to do, over at the Screw Loose Change blog and I came across a post there, wherein a truther was making this oft-heard claim: Which we hear quite a bit, and I know we've timed it and we know it's not accurate. It's one of those long-debunked staples of...

Hey. When the towers were hit, destroying those floors and so forth, I believe the towers ridistrubuted the weight from the top section to around the point of impact right? So, if the fires had burnt out instantly, would the building have survived? Or is it that the fires spread out over all...

I grow weary of the "total pulverzation" and the "Pyroclastic" cloud argument. Here are a couple of videos showing building demolitions where explosive are not used. yet there are billowing clouds of dust. So explain these CT proponents. http://www.youtube.com/watch?v=LHbC9gc_Ylo Building...

One of the many points of contention between conspiracy theorists and the official story is the influence of the fires in the World Trade Center buildings on the steel members of the central core. Truthers often claim that the fires were not hot enough to melt the steel columns or even weaken...

Or was it nano-thermite at work? The timing on this is very suspicious. Just as Americans are finally waking up to the Troooth, a toilet paper factory burns down and proves Dylan Avery & his buddies wrong? And what could possibly burn hot enough in a toilet paper factory to melt the girders?

Look at this simple gravity driven collapse. The steel simply weakened. There are no explosions involved. The concrete wasn't turned to dust. Now as an analogy look at this posterior. It is certainly not an elbow and has no characteristics of an elbow...

I was watching Abby's talking with dorks video just now and at about 1:30 there's a guy making the infamous "speed of gravity" argument. And it got me thinking; has gravity been shown to have a rate of propagation? If yes, what is that speed? What would happen if the mass of one of the twin...

So what? And now? What next? :boggled:

http://www.nytimes.com/2005/01/01/opinion/01diamond.html Registration Required, although, see www.bugmenot.com toy bypass compulosry web registration. See also Malcom Gladwell's _New Yorker_ review of Diamond's forthcoming _Collapse_: http://www.newyorker.com/printable/?critics/050103crbo_books