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Originally posted by bsbray11
Originally posted by albie
And THEN take time to imagine how UNQUALIFIED you are to even be thinking about this.
Or you can try to imagine how little you know about what any of us know.
Everything you listed burns in the temperature range of about 700 C, and certainly no hotter than around 800 C max, whereas steel only begins to have its yield strength lowered significantly around 600 C, and that's when the STEEL is 600 C, NOT the fire. To get the steel that hot requires the fire to be hotter than that, and it also requires a length of time for the necessary heat to actually transfer. None of the things you list could melt steel just by burning on their own.
Originally posted by albie
The metal only needed to be softened so much before the tremendous weight of the upper floors bent it.
Your calculations don't take that massive weight into account.
Nor do they show any imagination.
Originally posted by justin-d
Originally posted by CaptAvatarSome heat escapes, but much of it wouldn't, it is trapped within the building. As heat energy is released via the chemical reaction of burning materials, the temperature of the system will increase far above the temperature of the burning materials since the heat lost to the surroundings is less than the heat being added to the system. It isn't correct to say that the steel could only be as hot as the fire.
Yes, it is correct. Your argument is in direct contravention of the Zeroth Law of Thermodynamics and also confuses the concepts of "temperature" (which is an extensive property) and "heat" (which is intensive property). It is in contravention to the zeroth law since bodies in contact must always come to the same temperature. One body is the steel and the other is the hot plasma in the combustion plume. It is easy to measure the hottest temperature of that combustion plume by simply taking a small thermocouple and passing it around the flame. At the hottest point of the flame of an air-fuel fire, using kerosene from a jet tank or any of the items you have mentioned, one does not ever find temperatures near hot enough to melt steel. If the flame can't get hot, the steel can't get hot.
I studied Thermo for 2 years getting my BSME.
Why do you think that water doesn't boil instantly when you put it on the stove? You have to add energy to the water to raise the temperature over time. Once enough heat energy is added to the water it boils. If it is contained in a pressure vessel, you can keep adding heat energy and it becomes superheated steam, far hotter than the temperature water boils at in a pot.
Originally posted by Intheshadwos
Looks pretty damn hot to me
Any good calculated guesses to what the temp of that is?
created some form of molten metal dripping out of the windows
Originally posted by GrinningMoon
created some form of molten metal dripping out of the windows
Just FYI, I would be EXTREMELY cautious with this comment. It is very likely that the molten material actually seen dripping down the side of the building is molten aluminum from the aircraft (aluminum has a relatively low melting point among metals, and it is not uncommon to see aircraft bodies being melted by their own flaming jet fuel after a crash).
Originally posted by CaptAvatar
Sorry Justin, the Zeroth law states that any system not in equilibrium with it's surroundings (temperature hotter or colder) will eventually reach equilibrium with its surroundings.
You should do a few more google searches to really understand these concepts before posting and telling people they are wrong. Nothing I said contravenes any of the laws of thermodynamics
So let me get this straight. You are comparing a building collapsing to bending a coat hanger until it breaks (which requires a force to bend it one way and then the other over and over)? You are also saying that the building falling.. created the molten steel... On top of that you are saying that the 20 stories of damaged building fell on top of 80 stories of undamaged building, with about 10 stories to build speed... and it dropped the whole building into the basement. WOW. No wonder you cant get some people to see the truth. This is great. So I guess you are saying I could build a model of a tower out of any material... cut off the top 20 percent... drop it on the rest of the model and it would flatten it? That is the same logic. 20 percent of the building destroying 80 percent.
Originally posted by Tiloke
There seems to be a lot of people here who simply do not understand the laws of thermodynamics. Over and over again there are people who will shoot down any attempt to rebut the controlled demolition theory by shouting "WHAT ABOUT THE MOLTEN STEEL???".
First , I want you all to try a simple experiment. Everyone can do it, it only costs about 4 cents and its easy to do.
First, go to your closet and pull out a wire hanger. You can not use a plastic one for this. If you do not have wire hangers because your mom saw the movie "Mommy Dearest" and forbids them(like my mom did a long time ago), you can use any similar type strong wire or thin metal rod.
Now, take that hanger/wire and straighten it out. Now bend it back and forth in one spot until the metal becomes soft and breaks apart.
Now, this is important, as soon as the wire comes apart, I want you to touch the freshly broken edge of the wire to your lip or the back of your hand.
What happened when you did that?
Thats right , you got a little burn or felt the heat depending on what type of metal your wire was.
That, my friends is an example of whats called " The laws of thermo dynamics" These are the laws that state "Energy can not be created or destroyed, only converted to other types of energy."
The physical force(energy) of you bending the metal, since it had nowhere to go, was converted to heat, just like the WTC.
Now, lets imagine a million tons of energy , compared to the 2 pounds you put in the wire, falling and gaining more momentum as it falls. More and more of the buildings stored energy(thermodynamics term) is converted to kinetic energy. When the building reaches the ground all that kinetic energy needs to be converted to another type of energy. Now, what kind of energy did we just demonstrate kinetic energy can be converted to? Thats right , HEAT.
Now, if a tiny wire being bent with a force of your fingertips can get hot enough to burn you, do you think a couple billion times more force and material might make even more heat?
On top of that , concrete is a fabulous insulator. It is common knowledge that concrete homes pay less for heating and cooling than regular homes.
If you trap all that heat under hundreds of tons of concrete, it stands to reason that its going to stay hot for a while, much the same way your coffee stay warmer in a Styrofoam cup compared to a glass one.
The "molten steel argument seems to be another one of those "If I don't know how, it's a conspiracy." types of things that seem to be prevalent on this board.