[quote=ŠleveŽ One]lol, actually, The assumption that the specific heats are constant over the temperature range 25° - T° C, is a good approximation if T turns out to be relatively small (as it does). For larger values of T this assumption once again leads to a higher maximum temperature (as the specific heat for these substances increases with temperature). We have assumed the initial temperature of the surroundings to be 25° C. The quantity, (T - 25)° C, is the temperature rise.
So the amount of energy needed to raise one floor to the temperature T° C is
= (39,857 x 1,690 + 97,429 x 845 + 349,680 x 1,038 + 500,000 x 450 + 1,400,000 x 3,300) x (T - 25)
= (67,358,300 + 82,327,500 + 362,968,000 + 225,000,000 + 4,620,000,000) x (T - 25) Joules
= 5,357,650,000 x (T - 25) Joules.
Since the amount of energy available to heat this floor is 1,364,000,000,000 Joules, we have that
5,357,650,000 x (T - 25) = 1,364,000,000,000
5,357,650,000 x T - 133,941,000,000 = 1,364,000,000,000
Therefore T = (1,364,000,000,000 + 133,941,000,000)/5,357,650,000 = 280° C (536° F).
So, if we assume a typical office fire at the WTC, then the jet fuel could have only added 280 - 25 = 255° C (at the very most) to the temperature of the fire.
Summarizing:
We have assumed that the entire quantity of jet fuel from the aircraft was injected into just one floor of the World Trade Center, that the jet fuel burnt with the perfect efficency, that no hot gases left this floor and that no heat escaped this floor by conduction.
We have found that it is impossible the jet fuel, by itself, raised the temperature of this floor beyond 280° C (536° F).
Now this temperature is nowhere near high enough to even begin explaining the World Trade Center Tower collapse.
It is not even close to the first critical temperature of 600° C (1,100° F) where steel loses about half its strength and it is nowhere near the quotes of 1500° C that we constantly read about in our lying media.
"In the mid-1990s British Steel and the Building Research Establishment performed a series of six experiments at Cardington to investigate the behavior of steel frame buildings. These experiments were conducted in a simulated, eight-story building. Secondary steel beams were not protected. Despite the temperature of the steel beams reaching 800-900° C (1,500-1,700° F) in three of the tests (well above the traditionally assumed critical temperature of 600° C (1,100° F), no collapse was observed in any of the six experiments."
no way it mealted steel, people were standing in the hoel the plain made, could they withstand jet fuel burning, the answer is no. NEXT!
Since you seem to be so interested on the buildings falling. i would really like you to look at this site and read it all
http://www.tms.org/pubs/journals/JOM/0112/Eagar/Eagar-0112.html
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