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Originally posted by conwaylemmon
reply to post by GoodOlDave
I'll admit i'm a total crackpot sucker, but only because i'm responding to you again. I feel dumber each time. everyone else has quit already.
I happen to work in the film business. and $3000 is nothing if you're trying to present a film in multiple cities. FWIW
Your other points are just not worth it, although you DO address the OP's thread quite nicely. I'm going to go dust off my crack-pot and play online arm-chair explosive expert some more. its a really cool game.
Thanks for admitting you could be wrong. I believe you are. I wish you well. Good luck to you and to all of us. It has been enlightening. I'm sure I'll see you around.
Originally posted by kidtwist
I see it didn't take long for this thread to be infiltrated by the disinfo OS defending 'debunkers'.
The frustrations you talk about are very blatant on the ATS 9/11 forum, as you can see, your thread has already been hijacked, by the real 'hijackers'.
It only takes one 9/11 lie to be exposed and the rest of the facade comes tumbling down.
The 9/11 lies are being exposed one by one, and then there is a flurry by these so called 'debunkers' to try and cover up the lies with crazy disinfo.
My pensioner dad, who is ex military, laughs at some of the stuff these so called 'debunkers' come out with. He can see what game is being played by them, and can spot all the disinfo they churn out, and he isn't really interested in 9/11. The disinfo is so obvious to people that do not even research 9/11, let alone those that do!
Originally posted by anoncoholic
yeah they are predictable.
Tell us Dave, why the need to lie?
Popular Mechanics
I know you pros got all the answers but always ignore this simple question.
Originally posted by conwaylemmon
reply to post by GoodOlDave
I can't believe i'm continuing this.
You're right. there is a lot of bad info out there. and a lot of info that is tempting to believe, but not backed up by anything. So I'm going to attempt to explain to you why I believe what I believe. It is based entirely on my own observations, thoughts and physics 101, and towers 1 and 2.
1. Gravity makes things fall. And they fall at a constant rate. and it brings things straight down
Of course the buildings didn't fall at exactly the acceleration of gravity. But it was close enough to that rate, that most of the lower structure would have to have been removed.
Were all beam connections in the towers weakened by heat at precisely the right time in order to facilitate a cascading, complete failure? Extremely improbable. The steel structured buildings did not resist gravity on their way down.
Drop a wine glass onto a whole stack of wine glasses. does the entire stack break? doubtful. So we have the top of the building (15 floors?) essentially giving way and crushing the entire building. How does 15% of a thing pulverize 100% of the same thing.
...
Drop a 5 pound brick on a wine glass, it breaks. what about 5 pounds of sand?
Remember GRAVITY is the only thing that brings things to the ground. and it brings them straight down. So what then was the extra energy that caused massive amounts of matter to shoot out horizontally. Air pressure? Absolutely not. If potential energy is used up creating air pressure (kinetic energy in a horizontal direction), than we would have to add energy to bring the building all the way down.
I see a massive explosion when I watch the buildings fall. So, my science matches my observation, i think.
This is completely incorrect. Things only fall at a 'constant rate' once they have reached an air resistance that matches the force applied by gravity. Otherwise, things accelerate rather than remaining constant. This is important to know when measuring the descent of the towers. You seem to grasp this but I'm mostly taking issue with terms here as they can be confusing...
...You don't really have any evidence for this. The towers fell at approximately 2/3g and 3/4g. In order to show that the lower structure would have to have been 'removed' you'd need to present some calculations. The information we have available shows that in fact 1/3rd of the energy available at the crushing front is a huge amount of force and indeed the buildings did resist the collapse as best they were able.
Also no, all beam connections weren't weakened, there were very few beam connections at all.
The answer to the first part of this was contained within your post. It is a progressive process. However, you make some crucial mistakes. In your wine glass example, you drop the glass on the first in the stack, but you forget it must then be dropped onto the next one in the stack. The floors in the WTC were composed of a thin layer of structural material and then open office space composing nearly an acre. There was an awful lot of open space between them.
Secondly, while sand might seem in your head to be unlikely to damage a wine glass, you'd be surprised. You picked sand because it seems a harmless particle I assume, but lets look at more realistic scenario. Take a brick and smash it repeatedly with a sledgehammer. The debris you're left with will be some large chunks, some small chunks and some dust. Drop this onto a glass and you will see the exact same result.
Energy is not required to bring a building down completely. You're mistaking displacement for velocity. If energy is used up in accelerating / pressurising air then it is the velocity of the debris which is affected. The total displacement is a function of time.
Secondly, the debris was being ejected through the impacts as well as increased air pressure. Any aggregate poured into a tube will exert pressure against the sides. It's essentially analogous to the concept of pressure itself. The collapse front was slowed, but it'll reach the ground sooner or later.
Originally posted by conwaylemmon
You're right. I should have written constant rate of acceleration,
however your argument seems to actually strengthen mine. I did forget to consider the resistance of air on the way down. It should have taken even longer for the buildings to fall completely to (+-) ground level...
in only about 9% percent more time than it would have taken in a vacuum
This is confusing. what do you mean by "very few beam connections at all"? Your entire argument seems to imply that the building was made of floors only and not an outer steel shell and a massive inner core.
I can only drop the wine glass once. It is then entirely up to the next glass down. Are you suggesting that each floor was suspended in mid air with no structure supporting it, just waiting for something to come along and nudge it toward the next floor below?
I'd be very surprised if indeed 5 lbs of sand could do nearly the same damage as a 5 lb brick if dropped from the same height. Let's put your head under a falling brick and my head under falling sand and see who gets a goose egg. The point is, as a mass is crushed into smaller and smaller pieces, it will tend to have less and less crushing force.
This doesn't make any sense to me. So all you have to do to demolish a building is get it started?
Why would anyone hire an explosives expert to demolish a building when instead you can just take out part of a couple of floors and start a fire, and the rest is inevitable.
Total displacement is function of time? only?
Why should I put gas in my car? Everywhere I want to go is downhill from here. It's inevitable that i'll get there. It's only a matter of time.
Originally posted by exponent
This is incorrect. The numbers are based on the premise that the towers took only 10 seconds to fall. I believe the section you're quoting from refers to the time for the exterior panels to hit, not for the completion of collapse. Could you quote the source exactly please?
At 9:58:59, the South Tower collapsed in ten seconds
Oh I think I spot what's confusing here, the vertical steel parts are referred to as columns, and the horizontal ones as beams. The WTC used beam flooring only in the core and on mechanical levels, so that's what I was referring to.
its inevitable then
It's not quite like that, but it's much more like that than the idea of a bunch of solid objects sitting on each other. The floors were not attached by a hugely robust mechanism and they were not designed to handle much vertical load. Once the towers began collapsing and severed some of the floor connections, that debris is going to hit the next one down. As long as it has enough energy to fail those connections to it's going to keep falling and growing until it hits the ground.
This is exactly what we see in the towers, the outer structure becomes disconnected and pushed outwards by the debris raining down on the floors inside. The whole structure essentially becomes a funnel, the strongest elements resist the collapse and push the debris inside, towards the weakest.
That's not strictly true. What will happen is that you're smearing out the impact over time. If you were to wrap that 5lbs of sand in a simple duct tape ball and drop it, it would be almost as painful as the brick. The fact is though in reality we'd end up with a lot of chunks of various sizes, and all of them would contribute to the damage. Would you really want to get hit with 5lbs of broken bricks any more than intact bricks?
Pretty much yes:
Originally posted by conwaylemmon
Actually its right from the 911 commission report
At 9:58:59, the South Tower collapsed in ten seconds
its inevitable then
That's not what I see. sorry. I see far too much horizontal explosion. where does the core go?
If you smeared out the impact over time, you'd likely delay breakage, and ultimately delay or even halt collapse. that's part of the point. the rest of the point is not how fine the "sand" is, but that it is not as solid and rigid as it was to begin with, and therefore not only does it have less crushing force than it originally did, at least some of the falling (velocity, energy, inertia) is absorbed by the stuff breaking into bits, again likely slowing it down.
a video of controlled demolitions?
i'm tired
Originally posted by exponent
reply to post by petrus4
Yes, I'm an atheist. No, I'm not a troll. You have questions in front of you you can't answer, but instead of wondering if your viewpoint is distorted you tell people to just ignore the questions.