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November 21, 2007 at 12:08:00 Permalink 9/11 Most Americans Fail High School Science Diary Entry by arlen custer (about the author) |
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:::::::: 9/11 Most Americans Fail High School Science Talking with people about the building collapses of 9/11 and one generally gets similar responses. They say things like, “I don’t feel competent to have an opinion because I don’t know all the facts” or “I’m not a structural engineer or an architect”. I contend that you don’t have to be a structural engineer, architect or know all the facts in order to know that the official story of the collapses is totally impossible. Knowledge of basic high school physics is enough to prove the official explanations wrong. Newton’s law of gravity tells us exactly what to expect from falling bodies. A falling object will have a constant acceleration of 32ft per sec per sec. Despite an objects mass (weight) or size it can’t fall faster than this. If you drop an object from 1350ft., the height of the twin towers, it will hit the ground in 9.2 seconds without air resistance. When air resistance is included we would expect it to take about 12sec. This is exactly the time it took for the buildings to collapse, 10 to 13sec. as reported in the official Kean-Hammilton-Zelikow report and independent observations of the video record. Another fundamental law of physics is the conservation of energy. As an object falls it converts its gravitational potential energy into kinetic energy (speed). If the object has to spend some of its potential energy on something like moving air out of the way, it will have less kinetic energy. 9.2 sec. no air, 12 sec. with air. In the official explanation of pancake collapse a floor gives way and crashes into the floor below which gives way and crashes into the floor below crushing concrete into dust, as seen shooting out of the buildings, and so on to the ground. The falling floors must use a considerable amount of its potential energy to break loose the next floor and crush the concrete slabs into dust. All this energy must be subtracted from kinetic energy (speed). The fact that the buildings are known to have fallen at essentially free fall speed means that all the potential energy was converted to the kinetic energy of falling. There is no energy left to break steel, crush concrete or eject debris. The law of conservation of energy forces us to conclude that there had to be some additional source of energy. What was this energy and where did it come from? We should all be asking this question or we can just roll over and go back to sleep.
Just a plain working person that is sick of the lies and our ego driven complacency about those lies.
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