[kokoda]

$this->bbcode_second_pass_quote('kokoda', 'w')hy was 911 not used as an excuse for invading Iraq?

[Armageddon]

911 was the beginning of the war on terror ( in other words, it was the beginning for the fight for oil ). Cheney said this war will not end in our lifetimes. Obviousely.

[dukey]

you want motive for WTC 7
how about larry silverstein with his enormous payout due to the terrorist attacks.

$this->bbcode_second_pass_quote('', 'A')s a private developer with a 99-year lease on the World Trade Center, Silverstein insured the property. Following the September 11, 2001 attacks, he sought payment for the destruction of the towers as two incidents. The two dozen insurers held that it was one incident. If it were considered to be a single incident, the payout would be $3.55 billion and if it were two incidents, it would be $7.1 billion.

[Lighthouse]

$this->bbcode_second_pass_quote('armegeddon', 'p')ancaking is the most rediculous conclusion of all. ... Floors pancaking onto the floors underneath of each other would take longer because of the resistance . ... Also, there were huge steel center columns and outer columns that would be still standing if the floors pancaked. ...

[greenworm]

I still go with physics, none of which was presented. Can you show an example of this supposed momentum theory, I like math.

[Lighthouse]

$this->bbcode_second_pass_quote('greenworm', 'I') still go with physics, none of which was presented. Can you show an example of this supposed momentum theory, I like math.

[Armageddon]

$this->bbcode_second_pass_quote('Lighthouse', '')$this->bbcode_second_pass_quote('greenworm', 'I') still go with physics, none of which was presented. Can you show an example of this supposed momentum theory, I like math.

[Lighthouse]

$this->bbcode_second_pass_quote('armegeddon', '')$this->bbcode_second_pass_quote('Lighthouse', '')$this->bbcode_second_pass_quote('greenworm', 'I') still go with physics, none of which was presented. Can you show an example of this supposed momentum theory, I like math.

[greenworm]

$this->bbcode_second_pass_quote('', 'T')his statement shows clearly, that you do not have the slightest clue of basic physics. Back to school greenworm and take a lesson in conservation of momentum. Oh sorry I forgot that the American education system is ...

[Armageddon]

explain the pulverized concrete . explain why the cars and buses on main street were blown up before the twin towers fell. ( I will give you a hint. The janitors that were working heard massive explosions in the lower levels BEFORE the planes hit. One janitor was severly burnt. )

[Lighthouse]

[edit] waste of time

[2nd edit] Ok freefall again:

[quote="Schneibster "]When I did the calculations, what I got for a thousand feet was about nine seconds- let's see,
d = 1/2at^2
so
t = (2d/a)^1/2
a is 9.8m/s^2 (acceleration of gravity at Earth's surface, according to Wikipedia),
d is 417m (height of the World Trade Center towers, same source)
so
t = (834m/9.8m/s^2)^1/2 = 9.23s
OK, so how fast was it going? Easy enough,
v = at
v = (9.8m/s^2 x 9.23s) = 90.4m/s
So in the following second, it would have fallen about another hundred meters. That's almost a quarter of the height it already fell. And we haven't even made it to eleven seconds yet; it could have fallen more than twice its height in that additional four seconds. If the top fell freely, in 13.23 seconds it would have fallen about two and one-half times as far as it actually did fall in that time. So the collapse was at much less than free-fall rates.


Let's see:
KE = 1/2mv^2
The mass of the towers was about 450 million kg, according to this. So now we can take the KE of the top floor, and divide by two- that will be the average of the top and bottom floors. Then we'll compare that to the KE of a floor in the middle, and if they're comparable, then we're good to go- take the KE of the top floor and divide by two and multiply by 110 stories. We'll also assume that the mass is evenly divided among the floors, and that they were loaded to perhaps half of their load rating of 100lbs/sqft. That would be
208ft x 208ft = 43,264sqft
50lbs/sqft * 43264sqft = 2,163,200lbs = 981,211kg
additional weight per floor. So the top floor would be
450,000,000 kg / 110 floors = 4,090,909 kg/floor
so the total mass would be
4,090,909 kg + 981,211 kg = 5,072,120 kg/floor
Now, the velocity at impact we figured above was
90.4m/s
so our
KE = (5,072,120kg x (90.4m/s)^2)/2 = 20,725,088,521J
So, divide by 2 and we get
10,362,544,260J
OK, now let's try a floor halfway up:
t = (2d/a)^1/2 = (417/9.^1/2 = 6.52s
v = at = 9.8*6.52 = 63.93m/s
KE = (mv^2)/2 = (5,072,120kg x (63.93m/s)^2)/2 = 10,363,863,011J
Hey, look at that! They're almost equal! That means we can just multiply that 10 billion Joules of energy by 110 floors and get the total, to a very good approximation. Let's see now, that's
110 floors * 10,362,544,260J (see, I'm being conservative, took the lower value)
= 1,139,879,868,600J
OK, now how much is 1.1 trillion joules in tons of TNT-equivalent? Let's see, now, a ton of TNT is 4,184,000,000J. So how many tons of TNT is 1,139,879,868,600J?
1,139,879,868,600J / 4,184,000,000J/t = 272t

Now, that's 272 tons of TNT, more or less; five hundred forty one-thousand-pound blockbuster bombs, more or less. That's over a quarter kiloton. We're talking about as much energy as a small nuclear weapon- and we've only calculated the kinetic energy of the falling building. We haven't added in the burning fuel, or the burning paper and cloth and wood and plastic, or the kinetic energy of impact of the plane (which, by the way, would have substantially turned to heat, and been put into the tower by the plane debris, that's another small nuclear weapon-equivalent) and we've got enough heat to melt the entire whole thing.

Remember, we haven't added the energy of four floors of burning wood, plastic, cloth and paper, at- let's be conservative, say half the weight is stuff like that and half is metal, so 25lbs/sqft? And then how about as much energy as the total collapse again, from the plane impact? And what about the energy from the burning fuel? You know, I'm betting we have a kiloton to play with here. I bet we have a twentieth of the energy that turned the entire city of Nagasaki into a flat burning plain with a hundred-foot hole surrounded by a mile of firestorm to work with.[quote]

[Lighthouse]

[edit] more waste of time

[greenworm]

You solved the kinetic energy for the entire building, ha, that's funny, try again.

[Armageddon]

The explosions were BEFORE the planes hit, genius

[Armageddon]

more proof about bombs going off

http://911proof.com/11.html

quit being in denial.

[Lighthouse]

[edit] armageddon and greemwormy just confirmed my opinion about the average American ...

[2nd edit]ok genious, the site you quoted has just testimonies for events AFTER the plane hit the building.

[Carlhole]

With regard to fuel falling down the elevator shafts and exploding in the lobby and elsewhere, the elevator shafts were not continuous shafts.

They were divided into three sections, so to get to the top you would have had to have taken three different elevator rides. This means that the fuel-air mixture arriving from the planes at the upper floors would have had to have found another open shaft on its way down. And then another one after that.

Pretty smart stuff, that fuel-air mixture, huh?

[Armageddon]

carlhole, you can't reason with morons. It's useless

[Lighthouse]

$this->bbcode_second_pass_quote('Carlhole', '.').. They were divided into three sections, so to get to the top you would have had to have taken three different elevator rides... Pretty smart stuff, that fuel-air mixture, huh?

[Armageddon]

you are sure grasping for straws