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One of the more scientifically respectable arguments against the conventional view of 9-11 is that it would take more energy to crush the concrete than was available. One site uses a figure 0f 1.5 kilowatt hour per ton to crush concrete to 60-micron (.06 mm) powder. One kilowatt hour is 3,600,000 joules, so it takes 5,400,000 joules to crush a ton of concrete to 60 micron powder. Crush the 390,000 tons of concrete in a tower to powder and it takes 2.1 x 1012 joules to do the job. That's twice the gravitational potential energy of a tower. In other words, crushing the concrete should have absorbed so much energy that the collapse would have been halted.
let not forget these were very sturdy building.
is the information in this video incorrect?
Originally posted by PonyoSon
To argue that the explosion were cause by "electrical transformers, pressurized pipes, or what have you" is fine and i can except that as a possibility, but i would then have to also except that maybe the explosions were caused by explosives (the case for either can be made). Also explosions cause by "electrical transformers, pressurized pipes, or what have you" would only account for the explosions during collapse not those before.
Im afraid you are guilty of the very thing you accuse the "conspiracy people" of of doing. which is seeing what you want to see in the evidence.
I am fully aware that people make stuff up, but there are multiple videos of fireman and people who worked/lived in the area that reported events that don't support the official story. It seems that allot of these people were ignored during the investigation, which might make the public feel a little suspicious, wouldn't you agree.
...are you referring to the video?
Take the number of tons of concrete in both towers and subtract the number of tons of concrete recovered at the site?
Originally posted by Varemia
Apologies, but are you dense? This makes no sense at all!
If you had all other factors being equal, MINUS GRAVITY, the forces would balance out and the building would cease its collapsing. However, with gravity and the fact that the force does not completely dissipate upon demolishing a single floor, the collective debris becomes heavier and more kinetically active as it progresses downward. You can see proof of this looking at many other things.
FOR EXAMPLE:
If you remember some of those controlled demolitions of skyscrapers that went wrong, it was because when they blew the bottom support, the building began to fall and the earth resisted all the force, having far more mass with which to absorb energy. Plus the fact the building was a concrete exoskeleton in the one I"m thinking about. Regardless, it is an example of the physics.
This presentation is absolutely convoluted and you cannot say that the destruction defied physics when clearly you are misunderstanding the forces involved.
Take this to the boat and sink it!
Despite the presence of 400,000 cubic yards of concrete in each tower, the photographs reveal almost no evidence of macroscopic pieces of its remains
What have you proved in supporting the OS?
So, you showed me enough concrete to make up maybe one floor, if you're lucky.
Where are the other 109 floors?
Originally posted by okbmd
reply to post by PonyoSon
To be clear , I am not the one who introduced the percentages that are being argued about , so , maybe you should address that opinion to the one who did . Furthermore , when someone makes a claim in these threads , such as those percentages , would you rather that everyone simply accept those claims as truth , or do you feel it is okay to challenge said claims in an attempt to show whether those claims are true or false ?
I challenged that claim , as I am aware that there are those on this site who have been known to approve of allowing false information to be introduced as evidence . Do you have a problem with hearing both sides of the debate ? If not , then don't chastise me for challenging information that I know to be false , especially when I present sources that prove that information is false .
In case you missed it , here it is , for the FOURTH time now , a presentation that shows the absurdity of claiming that all the concrete was turned to dust . As you can see , even the percentages being argued in this thread , are also absurd .
One of the more scientifically respectable arguments against the conventional view of 9-11 is that it would take more energy to crush the concrete than was available. One site uses a figure 0f 1.5 kilowatt hour per ton to crush concrete to 60-micron (.06 mm) powder. One kilowatt hour is 3,600,000 joules, so it takes 5,400,000 joules to crush a ton of concrete to 60 micron powder. Crush the 390,000 tons of concrete in a tower to powder and it takes 2.1 x 1012 joules to do the job. That's twice the gravitational potential energy of a tower. In other words, crushing the concrete should have absorbed so much energy that the collapse would have been halted.
www.uwgb.edu...
As you see , this even supports your statement that there wasn't enough available energy to crush all of the concrete . So , since this compliments your own statement , what other problem(s) do you find with this study ?
let not forget these were very sturdy building.
is the information in this video incorrect?
Originally posted by ANOK
Am I dense? If you think gravity can overcome the resistance of a building that has been designed to hold it's own weight, against gravity, then you are the one that is dense.
BTW the debris was not falling straight down, it was all ejected laterally, otherwise there would be a huge pile of floors in its footprint.
-------------
HUH? How does that make any sense?
A controlled demo goes wrong because the resistance that was supposed to be removed wasn't, so the resistance resists the collapse and it either stops or falls to the path of least resistance.
----------------
Using your logic the boat will sink due to gravity.edit on 2/1/2011 by ANOK because: typo
Originally posted by ANOK
But Dave don't you think that firefighters would also know what an exploding transformer sounds like?
I'm pretty sure they would have more experience in all types of sounds heard during building fires than you.
Despite the presence of 400,000 cubic yards of concrete in each tower, the photographs reveal almost no evidence of macroscopic pieces of its remains
I have already showed this to be an OUTRIGHT lie , why do you insist I still consider it valid research ?
What the hell does this have to do with "the OS" ?
You stated all the concrete was turned to dust , I showed you were lying about that , with pictures , and now you want to jump on the "OS supporter" crutch . How pathetic is that ?
**There are a few broken pieces of concrete in the bottom of the debris, however I may have used the wrong word as to [color=gold]“all” of the concrete been pulverized, but I will stand behind 90% of the concrete been pulverized.**
Bottom line , you fail , your claims are false .edit on 1-2-2011 by okbmd because: (no reason given)
Originally posted by GoodOlDave
Originally posted by bsbray11
Right, and can you show us the picture of this three-story bulge again?
If such pictures exist, I don't have them.
I'm going by eyewitness accounts, and the eyewitness accounts didn't come from some drunk guy lying in his own urine in the gutter, nor did it come from the speculation of some researcher who was over in Los Angeles at the time. It came from a deputy fire chief of the NYFD who was standing there fighting the fires in WTC 7 who reported this.
I never said NIST claimed the damage from the collapse of the north tower caused fatal structural damage to WTC 7. I said it was the thermal expansion from the fires that caused the collapse. I subscribe to teis scenario because the unnatural bulging that witnesses had seen support the scenario. If you can explain how controlled demolitions can cause a three story tall bulging in the side of the building as well as cause a building to collapse from the inside out then I'd like to hear it.
I'm not demanding rigorous proof. I'm demanding to see ANY proof.
the photographs reveal almost no evidence of macroscopic pieces
Originally posted by bsbray11
Then I'm going to have to go with other eyewitnesses, and even NIST, all of whom say the impact damages were insignificant to the "global collapse" sequence.
And I have a testimony from a NYPD officer who was on duty that day at WTC7, and said there was no way the amount of damage was going to result in the whole building falling down, and who said the lobby exploded when the building started "collapsing." You've read it, it's Craig Bartmer. So what makes yours better than mine? Nothing at all.
I don't even believe there was a significant bulge in that building. Maybe they could measure deflections and expansions typical of any other skyscraper that will be on fire, and these things do happen. But something that is going to result in a symmetrical free-fall acceleration to the ground, no. And all you're doing is taking vague testimony and trying to bolster it into an explanation in itself, but it isn't even close.
And yet when we come on here complaining about the total lack of proof for anything the feds published, you ignore it and expect us to come up with everything.
Originally posted by Varemia
Why do you trust the opinions of some people, but not the observations of others? Observations tend to be unbiased, but what truthers cling to are the opinions.
Originally posted by GoodOlDave
In other words, nothing Craig Bartmer says is refuting what Peter Hayden says. Your problem is that what Bartmer is actually saying ISN'T what you think he's saying...which isn't surprising, seeing it was that lying POS con artist Dylan Avery from Loose Change who made that interview video you're quoting to begin with.
I don't even believe there was a significant bulge in that building. Maybe they could measure deflections and expansions typical of any other skyscraper that will be on fire, and these things do happen. But something that is going to result in a symmetrical free-fall acceleration to the ground, no. And all you're doing is taking vague testimony and trying to bolster it into an explanation in itself, but it isn't even close.
Is that a fact?
"...also we were pretty sure that 7 World Trade Center would collapse. Early on, we saw a bulge in the southwest corner between floors 10 and 13, and we had put a transit on that and we were pretty sure she was going to collapse. You actually could see there was a visible bulge, it ran up about three floors. It came down about 5 o’clock in the afternoon, but by about 2 o’clock in the afternoon we realized this thing was going to collapse"- Deputy fire chief Peter Hayden.
There isn't anything remotely vague or hard to understand about Peter Hayden's testimony. They had to put a transit to support a damaged building and even then they knew the building was in such bad shape it was going to come down anyway. Claiming this can be interpreted in any other way somehow is wishful thinking.
And yet when we come on here complaining about the total lack of proof for anything the feds published, you ignore it and expect us to come up with everything.
I'm not ignoring it. In fact I'm repeatedly telling you why this is- you're getting all your information from those damned fool conspiracy websites
Originally posted by bsbray11
There really isn't anything hard to understand about what I'm saying either.
WTC7 was 100% unprecedented for building fires. That means nothing like it had ever happened before in history, period. No skyscrapers collapsing completely into themselves, to the ground, symmetrically, even close to the rate of gravity. So how do you predict something that's never happened before, when you're supposedly using some established procedure?
Here's where you are confused. "Collapse" on and prior to 9/11 meant something very different from the "collapses" that happened for the first time ever that day, and haven't happened since. So when someone says they are predicting a "collapse," it would be impossible for them to imagine what actually happened to WTC7, outside of imagining a controlled demolition, because no other kind of "collapse" in the history of the world has looked anything remotely similar.
No no no. I'm not getting all my information anywhere. I'm asking YOU for PROOF from the Damned Fool NIST Report.