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According to your definition, there is not one single "rigid body" in this universe.
That may be your definition. Bazant clearly doesn't agree with you. Since he has his "rigid body" crush up slightly at the beginning of the collapse and crushed up completely at the end of the collapse.
Bazant's definition seems eminently clear to me: A "rigid body" is a structure that moves thru space as a unit UNTIL some component's stress exceed its ultimate strength. At which point, that component detaches from the parent rigid body."
Sensible people also understand the concept of "approximately equivalent to"...
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Please stop senselessly dodging questions based on your personal semantics.
OK, the "collapse wavefront", which I am DEFINING (so it does exist) as "the vertical location just above the topmost floor of the tower that is still intact at any given time".
Now please answer my question:
2. If the collapse wavefront can so OBVIOUSLY fracture the connections between the cross trusses & the core columns (as shown clearly in the "core remained standing" video, then how can you possibly write that "in order to ... crush down [the towers] you have to destroy the core"?
By my definition of this term, the collapse wavefront has moved BELOW the visible, standing but damaged core in this video:
http://video.google.com/videoplay?docid=-1615521411849861778
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Propaganda noted. Now please answer MY question:
3. WHAT was going to stop the "collapse wavefront" [my definition] after it had descended, say 20 floors? after 40 floors? after 80 floors? According to your theory, did they have to keep blowing up floors? Or was there some point where the collapse was self-sustaining?
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Evasion noted. Please answer MY question.
4. Will the football players spread over 6 yards create a bigger or smaller impact on the wall when they run into the wall, compared to the same numbers of football players spread over 30 yards?
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Evasion noted. Please answer MY request.
5. Please go back to post #624 & copy & paste the place where I mention the following statements. Or rescind them.
a. An "IKEA bookcase that disassembles itself..."
b. An "IKEA book case ... becomes solid rubble that destroys the ground..."
c. An "IKEA book case ... becomes solid rubble that destroys ... everything"
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As soon as you answer my questions & request, I'll be happy to answer yours.
Tom