In article ,
Freedom Fighter wrote:
"Jorge" wrote in message
.. .
On Thu, 13 Mar 2008 18:43:13 GMT, "Freedom Fighter"
wrote:

"barnegatdx" wrote in message
...

snip

On Mar 13, 10:06 am, barnegatdx wrote:
Controlled Demolition?

- Rubbish . . .

http://www.popularmechanics.com/tech...w/1227842.html

That propaganda shill rag Popular Mechanics actually bowed out of a
discussion that they couldn't win when, in a live interview, they got
caught
in a completely absurd fabrication. Listen to this interview:
http://www.youtube.com/watch?v=WULRQCgvsdE

snip psychotic Trufer rantings

It is really hard to put up with such unresonable psychotic ****s that
have no
concept of reality and factuality.

Ad-hominem attack is the refuge of unintelligent and immature people
incapable of disproving a valid assertion with facts or logic, so in
frustration they resort to childish name-calling.

Pathetic!

You just get to a point with these folks where the best thing to do is to
give
up because you just get visions of these ****s getting on one of their
mesaanic
highs and threatening your family some dark night.

Jorge

It is those that you blindly defend that you really have the most reason to
fear.


Don't assume that people that call you a loon also support what the
current administration is doing in our name.

"Why do I bother with these morons? [the Truth Movement] Because
they are destroying the movements which some of us have spent a
long time trying to build. Those of us who believe that the
crucial global issues - climate change, the Iraq war, nuclear
proliferation, inequality - are insufficiently debated in
parliament or congress; that corporate power stands too heavily on
democracy; that war criminals, cheats and liars are not being held
to account, have invested our efforts in movements outside the
mainstream political process. These, we are now discovering, are
peculiarly susceptible to this epidemic of gibberish.

The obvious corollorary to the belief that the Bush administration
is all-powerful is that the rest of us are completely
powerless. In fact it seems to me that the purpose of the "9/11
truth movement" is to be powerless. The omnipotence of the Bush
regime is the coward's fantasy, an excuse for inaction used by
those who don't have the stomach to engage in real political
fights."
- George Monbiot http://www.monbiot.com/


--
Al Dykes
News is something someone wants to suppress, everything else is advertising.
- Lord Northcliffe, publisher of the Daily Mail

"barnegatdx" wrote in message
...

A Huge, Invisible Monster , moving north to south., and detouring into
New York harbor

caused the Towers to collapse;


- But first, he threw two airplanes , one into each tower..

Look at the images of NY harbor after the attack; You can see his
footprints..


& The Math I've done supports this theory . .

Barne,
Please, try and find some help! Maybe your family Doctor can help with
a referral.

We are your friends, we want to help, just ask.

Burr

In article 5870b4a1-0c71-4861-b066-484eaa62c6c2
@i29g2000prf.googlegroups.com, says...
WTC Towers: The Case For Controlled Demolition
By Herman Schoenfeld

In this article we show that "top-down" controlled demolition
accurately accounts for the collapse times of the World Trade Center
towers. A top-down controlled demolition can be simply characterized
as a "pancake collapse" of a building missing its support columns.
This demolition profile requires that the support columns holding a
floor be destroyed just before that floor is collided with by the
upper falling masses. The net effect is a pancake-style collapse at
near free fall speed.

This model predicts a WTC 1 collapse time of 11.38 seconds, and a WTC
2 collapse time of 9.48 seconds. Those times accurately match the
seismographic data of those events.1 Refer to equations (1.9) and
(1.10) for details.

It should be noted that this model differs massively from a "natural
pancake collapse" in that the geometrical composition of the structure
is not considered (as it is physically destroyed). A natural pancake
collapse features a diminishing velocity rapidly approaching rest due
to the resistance offered by the columns and surrounding "steel mesh".

DEMOLITION MODEL

A top-down controlled demolition of a building is considered as
follows

1. An initial block of j floors commences to free fall.

2. The floor below the collapsing block has its support structures
disabled just prior the collision with the block.

3. The collapsing block merges with the momentarily levitating floor,
increases in mass, decreases in velocity (but preserves momentum), and
continues to free fall.

4. If not at ground floor, goto step 2.


Let j be the number of floors in the initial set of collapsing floors.
Let N be the number of remaining floors to collapse.
Let h be the average floor height.
Let g be the gravitational field strength at ground-level.
Let T be the total collapse time.

Using the elementary motion equation

distance = (initial velocity) * time + 1/2 * acceleration * time^2

We solve for the time taken by the k'th floor to free fall the height
of one floor

[1.1] t_k=(-u_k+(u_k^2+2gh))/g

where u_k is the initial velocity of the k'th collapsing floor.

The total collapse time is the sum of the N individual free fall times

[1.2] T = sum(k=0)^N (-u_k+(u_k^2+2gh))/g

Now the mass of the k'th floor at the point of collapse is the mass of
itself (m) plus the mass of all the floors collapsed before it (k-1)m
plus the mass on the initial collapsing block jm.

[1.3] m_k=m+(k-1)m+jm =(j+k)m

If we let u_k denote the initial velocity of the k'th collapsing
floor, the final velocity reached by that floor prior to collision
with its below floor is

[1.4] v_k=SQRT(u_k^2+2gh)


which follows from the elementary equation of motion

(final velocity)^2 = (initial velocity)^2 + 2 * (acceleration) *
(distance)

Conservation of momentum demands that the initial momentum of the k'th
floor equal the final momemtum of the (k-1)'th floor.

[1.5] m_k u_k = m_(k-1) v_(k-1)


Substituting (1.3) and (1.4) into (1.5)
[1.6] (j + k)m u_k= (j + k - 1)m SQRT(u_(k-1)^2+ 2gh)


Solving for the initial velocity u_k

[1.7] u_k=(j + k - 1)/(j + k) SQRT(u_(k-1)^2+2gh)


Which is a recurrence equation with base value

[1.8] u_0=0



The WTC towers were 417 meters tall and had 110 floors. Tower 1 began
collapsing on the 93rd floor. Making substitutions N=93, j=17 , g=9.8
into (1.2) and (1.7) gives


[1.9] WTC 1 Collapse Time = sum(k=0)^93 (-u_k+(u_k^2+74.28))/9.8 =
11.38 sec
where
u_k=(16+ k)/(17+ k ) SQRT(u_(k-1)^2+74.28) ;/ u_0=0



Tower 2 began collapsing on the 77th floor. Making substitutions N=77,
j=33 , g=9.8 into (1.2) and (1.7) gives


[1.10] WTC 2 Collapse Time =sum(k=0)^77 (-u_k+(u_k^2+74.28))/9.8 =
9.48 sec
Where
u_k=(32+k)/(33+k) SQRT(u_(k-1)^2+74.28) ;/ u_0=0


REFERENCES

"Seismic Waves Generated By Aircraft Impacts and Building Collapses at
World Trade Center ", http://www.ldeo.columbia.edu/LCSN/Eq...C_LDEO_KIM.pdf

APPENDIX A: HASKELL SIMULATION PROGRAM

This function returns the gravitational field strength in SI units.

g :: Double
g = 9.8

This function calculates the total time for a top-down demolition.
Parameters:
_H - the total height of building
_N - the number of floors in building
_J - the floor number which initiated the top-down cascade (the 0'th
floor being the ground floor)


cascadeTime :: Double - Double - Double - Double
cascadeTime _H _N _J = sum [ (- (u k) + sqrt( (u k)^2 + 2*g*h))/g | k-[0..n]]
where
j = _N - _J
n = _N - j
h = _H/_N
u 0 = 0
u k = (j + k - 1)/(j + k) * sqrt( (u (k-1))^2 + 2*g*h )


Simulates a top-down demolition of WTC 1 in SI units.

wtc1 :: Double
wtc1 = cascadeTime 417 110 93

Simulates a top-down demolition of WTC 2 in SI units.

wtc2 :: Double
wtc2 = cascadeTime 417 110 77


No. It was the Romulans. Using holgraphically enhanced disruptors to do
the initial damage to the buildings, then they used their special
tractor beam to shove the towers down. WTC7 was a "lucky hit".

Or, it was the two planes that flew into them, and the fires that came
as a result.

BDK

Godzilla wouldn't do anything like that.Three of my little doggys half a
dozen or so, rubber squeaky doggy toys are Godzilla toys, I buy them at
the pet store.Godzilla is harmless.
cuhulin

wrote absolutly nothing of
importance message
---snip the bull-****---

hey clueless schoenfeld ,
just always remember the families and the ones that lost
their lives...
and
stop the stupid finger pointing to something that you are
obviously
clueless about !
also,
stop your damn cross-posting of bull-**** to groups that
couldn't care less
about what your clueless-ass has to say.

no real need for another of your stupid remarks.
unless you like ****ing in the wind !

plonk

wrote:
WTC Towers: The Case For Controlled Demolition
By Herman Schoenfeld

In this article we show that "top-down" controlled demolition
accurately accounts for the collapse times of the World Trade Center
towers.

Truthers suck. Big time.

Venger

www.libertypost.org Riddle Me This.
Why isn't the number 11 called onety one?
cuhulin

Your theory might be a bit more convincing, if Bin Laden hadn't taken credit
for it.

Oh yeah that's right, Bin Laden is merely and American fiction. He does not
really exist, the CIA sends in tapes made by half of a co-joined twin. The
other half hides in the White House, which is why we never see Bush and Bin
Laden together in public. They are both halves of the same guy.

But did you really know, that the Japan really nuked itself and made it look
like we did it? Did it to get world sympathy and America aid dollars. You
know how much better they are at electronics and all that. Think about it,
if we had really built the bomb Halliburton would have had a no bid
contract, and the cost overruns would have been staggering. Not to mention
it would have taken two planes to carry it.

Jose

"Jose" cross-posted, off-topic in message
---snip the cross-posted, off-topic message---

get a clue and stop cross-posting, off-topic to groups
that couldn't care less about your subject.

this is cross-posted back only to find "Jose".
everyone else,
please excuse the cross-post....

Good thing y'all didn't hear that ''one'' y'all would have ran for
cover.
cuhulin