> -----Original Message----- > From: [EMAIL PROTECTED] [mailto:[EMAIL PROTECTED] On > Behalf Of Robert Seeberger > Sent: Thursday, June 29, 2006 3:20 PM > To: Killer Bs Discussion > Subject: Re: Physics Prof Finds Thermate in WTC Physical Samples > > Robert G. Seeberger wrote: > > > > . A stiffer join means that force is > > transmitted through the structure more efficiently, so weakening > > vibrations could have sundered the lower parts of the structure > > before > > the actual wave of collapse reached a particular level. > > Let me clarify myself a bit here. > I'm proposing that there is a damaging kinetic shockwave that runs > ahead of the actual wave of collapse weakening structural members to > the degree that the collapse wave progresse almost unimpeded.
Ah, that does make sense. If one thinks of the force on a steel beam when thousands of tons fall on it, one can think of a significant shock wave traveling at the speed of sound. That speed in steel is about 6000 meters/sec and close to 20,000 feet/sec. Dan M. _______________________________________________ http://www.mccmedia.com/mailman/listinfo/brin-l
