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Originally Posted by ThunderBalls
. Demolitions take weeks of planning not hours.
When you eliminate the impossible, whatever remains - however improbable - must be the truth.
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First - I am not a conspiracy theorist - I deal in science as that was my lifes work prior to retiring - as a physicist.
If anyone believes that the WTC came down due to the planes - all I can say is that it is physically impossible to fall as fast as they did without help from below and a lot of it - the 10 secs or so put out in the Official Report on 9/11 and seen visibly on tv would equate to Earth having a gravity effect of many times normal only at that one spot in NYC - whether you want to accept it or not - all things on earth fall at exactly the same speed - dependent on friction of course(which in the case of floors collapsing on top of each other is a lot of friction) -and totally independant of their weight - this has been proven over and over for at least 500 years - and is one of the very basic premises of physics(I believe it was Newton and his apple tree that started this conspiracy theory).
Second scientific problem with this is really a little more common sense - the floors where one of the planes hit - considered in the official report as the source of failure due to fire heat and metal collapse - would require certain amounts of heat to get to that point - around 1500 deg F. Assuming that all of the jet fuel (10,000 gals is what they left with on takeoff) burned inside the building (which based on the pictures posted in this thread really didnt happen - looks like most was an outside the building fireball) - I would agree that the temperature could reach that point.
However - this part doesnt make sense(and evidently based on legal suits that are being filed by firefighters associations shouldnt make sense) - just before one of the towers fell - firefighters were on their way to put out the fire - they were in the stairwell leading from the floor just below the floor where the plane hit - and were in communication with the temporary command post set up by the mayor - and reported on their radios they were going into the floor where the fire was - just as the building collapsed - of course these were some of the firefighters killed. This means that human beings were able to function normally in a temperature that is 500 degrees above the temperature used to cremate dead bodies in a mortuary.
Third and last - the actual engineering studies used when the towers were built called for the ability for a jet carrying over 20000 gallons of fuel to be completely immeresed in the building (all of the fuel burning inside - no fireball outside) and allow the firefighters 3 hours to fight the fire with structural failure assumed from the impact of the plane on the steel beams occuring at about the same rate that actually occured - and with no possibility of collapse of the building itself - note that a lot has been made of the size of the jet (707 vs 767) - the weight of the plane and attendant damage are based on the primarily the weight of the fuel since there are very small other weight differences - and again the official report states that these planes only had half of the fuel load that had been calculated for originally.
I draw no political conclusions here (although I really like the comparison someone made about the Reichstag building fire and subsequent Decree for the Protection of People and State that Hindenberg signed for Hitler being real damn close to the Patriot Act) - just scientific and common sense observations.