How can two airplanes pulverize 3 superstructures into dust?
929670
it still baffles me as well!
255445
The Boeing 767 is equipped with "triple INS" which is a navigation system that updates the aircraft's position on a continuous basis and allows it to be flown directly to any point on the earth.  Anyone knowing the basics of INS navigation could have easily flown those planes to New York, Washington DC, Katmandu or anywhere else.\n\nHowever, there is a simpler explanation in this case.  Both of the planes that hit the WTC towers were hijacked over eastern Massachusetts.  The hijackers then simply flew down the Hudson River to Manhattan.\n\nIn the case of the other two aircraft, there isn't an easy answer, (since there isn't a river to follow directly) but both of them apparantly got lost enroute.\n\nBTW: This is an excellent example of how the two New York attacks were carried out completely differently from the Washington DC attacks.
802571
wow...in 1968 i watched what appeared to be a shiny metallic piece of  crumpled metal tumble towards earth for 10 minutes, it was probably space debris or toilet ejecta from a passing airliner.what you seen was likely hardboard insulation like they use on construction sites, that stuff will fly a long ways with little wind....or else it was a runaway magic carpet
27708
try 3 layers with epoxy-resin  shound do the job
359184
There is no wind.  The conveyor belt isn't moving air to cause lift.  Just because the conveyor belt is moving the plane's wheels doesn't mean it will fly..   Point the plane the other way and it will.
378767
You would complete dissolve it in strong acids and then separate the metals by qualitative analysis techniques.  Not simple and very expensive.
594773
I have seen it several years ago. You can make a 7 foot hole with a 767 jumbo jet. One of the engines alone would make a larger hole that what the damage shows.
563583
racks, yes. \nalso depends on how many and big a bomb you are talking about. \nwhen we drop'em, it's a lot or one VERY big one. so conventionaly, it's best to use planes.
669843
david scott did this on the moon.  the two objects were an aluminum hammer and a falcon feather.\n\nDuring the final minutes of the third extravehicular activity, a short demonstration experiment was conducted. A heavy object (a 1.32-kg aluminum geological hammer) and a light object (a 0.03-kg falcon feather) were released simultaneously from approximately the same height (approximately 1.6 m) and were allowed to fall to the surface. Within the accuracy of the simultaneous release, the objects were observed to undergo the same acceleration and strike the lunar surface simultaneously, which was a result predicted by well-established theory, but a result nonetheless reassuring considering both the number of viewers that witnessed the experiment and the fact that the homeward journey was based critically on the validity of the particular theory being tested.\n\nwatch this:\nhttp://nssdc.gsfc.nasa.gov/planetary/image/featherdrop_sound.mov
1119717
Re-entry would just scatter fine radioactive dust in the atmosphere.  Essentially a Dirty Bomb effect.  Moreover it costs about ten thousand dollars a pound to put something into orbit.  Not a very cost effective way to make hot powder.  \n\nThe best method is to coat the metal in ceramic and bury it in a geologically stable area and forget about it.  It will never hurt anything buried deep enough.
1035217
guns and bazookas and tanks and bomber airplanes
14321
First, look at any typical airfoil shape. It is sort of teardrop shaped, with a round end and a pointy end, but not symmetrical--one side seems flatter than the other. Let's imagine that the pointy end points to the right, the round end point to the left, the flatter side is on the bottom and the rounder side is on top.\n\nLet air flow from the left to the right. Air flowing near the airfoil at speeds that are not too fast (less than the speed of sound) is not compressible. Let's follow two tiny blobs of air that start next to each other, but approach the round end of the airfoil in such a way that one blob goes up and over the airfoil, while the other slides over the bottom. These two blobs will arrive at the pointy end at approximately the same time. But, the one going up and over as a longer path to take and therefore must travel faster. All the air molecules in a blob are actually thrashing about randomly and can collide with other air blobs nearby as well as the upper surface of the airfoil. This is true of the upper blob and the lower blob. But, if the upper blobs average speed is faster, then its molecules collide with the upper surface of the airfoil less over the trip from round end to point end than do the molecules in the lower blob. Therefore the pressure caused by the collisions of the molecules in the upper air blob on the upper side of the airfoil is less than the pressure on the lower surface caused by collisions of the lower blob's molecules with the lower surface. This means there is a difference of pressure between the two surfaces--pressure drops as you go from upper to lower surface. If the airfoil is rigid, then this difference in pressure will become a force exerted on the airfoil from below, called lift. This lift is what makes an airplane rise on takeoff as it rushes through the air with its wings whose cross-sections are airfoil shaped, rounded end into the oncoming air and flatter side towards the ground.
454937
ashes to ashes and dust to dust.  aka worm food.
897167
I think what you are asking about is called an electrostatic precipitator.  You can buy them at Radio Shack or from The Sharper Image.  There are also large industrial sized versions that work with smoke stacks on large factories to reduce the amount of ash that is discharged.\n\nThat will make for a nice science project.  Please be careful, though, because these devices operate at a very high voltage.
964586
Try this link\n5. Operating instructions\n5.1. Paper size adjustment\nAfter the lateral paper guides (1) have been adjusted to the size of the paper being folded, the back stop (2)\nhas to be placed to the end of the paper pile. This avoids that the paper moves backwards because of the air\nblow. The achieve a maximum sheet separation, all air jets (4) outside the paper stack have to be closed\n(thus ensuring optimal air pressure under the stack)
100791
Razor definately. They use recylcled aircraft alluminum and are relatively cheap. Here's the web link to get you started. http://razor.com/. Hope this helps. Vote for me! Will.
490158
Some parts landed an the far side from the entry points. The rest which was in the towers became an eternal part of building parts and the ash remains of the victims. I did see a part of a tail section and an entire engine in some pictures.