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so 9/11 conspiracy theorists get a

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little bit confused about what happens

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when a plane hits something they'd like

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to compare other plane crashes more

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ordinary plane crashes to the crashes of

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the World Trade Center and the

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Shanksville crash now these pressures

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are very different because most crashes

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happen when a plane is either trying to

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land or is trying to take off or he's

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trying to learn because it's red and

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fuel it doesn't have any power

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so these crashes are normally at very

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slow speed now when a plane comes in to

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land it comes in and goes parallel to

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the ground until it slows down enough to

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stop when a plane crashes where it's

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trying to land it's usually because it

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goes bit too slow or it goes a bit a

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little bit too fast and it just can't

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maintain control and eventually

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something hits the ground in a way

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that's not intended and the plane will

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tumble over now we could simulate this

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with this by like throwing a plane

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around but planes model planes of this

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size about two inches incredibly strong

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so we have to find some different analog

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that we can use instead and what I've

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decided to use was an egg XR reasonably

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strong you can roll them around you can

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you can drop them from a few inches onto

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a normal surface and they won't break

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they're fairly strong but if I throw

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them against the wall obviously it's

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going to smash so I'm gonna do three

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experiments I'm going to drop it onto a

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concrete surface from a a high altitude

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I'm gonna try the equivalent of landing

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a plane crash landing a plane by bring

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it in like this and uncontrollable

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trajectory I'm going to try dropping it

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into a softer medium which is some cat

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litter I have in the box here see what

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happens there and I'm going to try

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dropping it onto a grid metal grid that

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I have it's just a couple of quarter

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inch metal square grids

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so we'll see what happens when we drop

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that on onto it from a high altitude now

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is the same as really is going very fast

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sideways going very fast down the result

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is the same so it's just a an easy way

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of getting a consistent velocity so

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so here we have the equivalents of a

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low-speed plane crash and as you can see

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the end result large pieces of egg

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that's obvious with the plane has

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crashed test two onto concrete from

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above and watch my disintegration here

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compare that to test three into the cat

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litter and this experiment is into a

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wire mesh you always have to be careful

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when you use scale models to demonstrate

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things since a lot of misunderstanding

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of physics in the conspiracy world has

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to do with scale there's a significant

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risk of increasing that confusion

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obviously an egg is a very poor scale

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model of a plane but in all scale models

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we have to have trade-offs here I wanted

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something that was both heavy and strong

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enough to withstand quite a bit of force

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but would also break under stronger

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impacts the egg works fine for this even

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though it's wrong in many other ways the

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model plane would not work at all as the

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scale is thousands of times too strong

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what we are demonstrating here is that

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different circumstances lead to

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different results a low-speed shallow

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crash breaks the egg open but the shell

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is largely intact a high speed steep

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angle crash breaks the shell into much

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smaller pieces which are ejected long

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distances a high speed steep impact into

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gravel also shatters the shell into

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small pieces but the result is more

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constrained in a crater hitting a

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surface with holes in it allows some of

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the egg to pass through remember these

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are not meant to be exact recreations of

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the Nile

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in packs they just serve to illustrate

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the types of differences in

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circumstances you should be looking at

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and some of the types of differences in

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the end results so by all means compare

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other plane crashes to the 9/11 crashes

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but make sure you always consider the

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differences how fast is the plane going

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what did it hit and at what angle