free fall speed
(So how did I do? Heavy constructive criticism is most welcome!)
This is the first of three YouTube videos of the June 30, 2009 PowerPoint presentation I gave for my CHEM 1411 class at South Texas College (STC). The subject was on thermite and thermate and how each of their respective nano-sized variants may have contributed to the collapse of World Trade Centers 1, 2, and most especially, 7.