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Author Topic: Scientists debunk quicksand myth
snopes
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Falling into quicksand isn't quite as bad as some movies make it out to be. Instead of being sucked all the way in, quicksand victims will float once they get about waist deep, according to a new study.

http://msnbc.msn.com/id/9516779/

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NeeCD
Happy Holly Days


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Mythbusters did a really good show on this and came to the same conclusion.

ETA link

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What does "Bookachow", "YOMANK!" and other lingo mean?

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NocturnalGoddess- naughty or nice?
Carol of the Dells


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In all the survival guides I've read, you can actually float on your back and either pull yourself to solid ground or use some type of level to push yourself.

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"I saw weird stuff in that place last night. Weird, strange, sick, twisted, eerie, godless, EVIL stuff... and I want in."- Homer Simpson

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NocturnalGoddess- naughty or nice?
Carol of the Dells


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That should read "lever"

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"I saw weird stuff in that place last night. Weird, strange, sick, twisted, eerie, godless, EVIL stuff... and I want in."- Homer Simpson

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Pseudo_Croat
Angels Wii Have Heard on High


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Whne one has sunk as far as one can in quicksand, how long does it take on average to free oneself if one stretches on one's back and remains calm? Would creatures larger or smaller than humans be affected in the same way?

- Pseudo_Croat

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"At all events, people who deny the influence of smaller nations should remember that the Croats have the rest of us by the throats." - Norman Davies, Europe: A History

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Ganzfeld
Let There Be PCs on Earth


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I disagree that this disproves the myth entirely. There are many diferent kinds of "quicksand" including some that is sand with lots of air in it. If it were deep, one may be able to sink quickly and deeply. I doubt that the myth is true but a few experiments aren't quite enough.
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BlueStar
Happy Holly Days


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"Now I'll just pull my arms out with my face"
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Joey
I Saw Three Shipments


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quote:
Originally posted by BlueStar:
"Now I'll just pull my arms out with my face"

[lol]

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"If something's hard to do... it's not worth doing!" - H J Simpson

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Brad from Georgia
Ding Dong! Merrily on High Definition TV


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My dad took me fishing more often than I would have wished, and once when I was about twelve I got bored and went off following a set of big bird tracks (probably a heron, but that's beside the point).

The bird had strolled across a big, low, wet patch, and when I followed, my foot suddenly plunged down into the mud, and I mean down past my knee. Quicksand, I thought, remembering all those movie characters who had drowned tragically in enormous vats of oatmeal.

But that's as far as I sank. I sat down and sort of scooted backward until I dragged myself out of the muck. Lost one of my shoes.

And when I limped back to Dad and told him of my near-death experience, he wouldn't even take me home. I had to sit around wet, muddy, and miserable for another four hours.

Brad "because the bass were biting, that's why" from Georgia

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Malruhn
The "Was on Sale" Song


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I am sorry to laugh at your incident, Brad, but we MUST be cousins!!

Your dad sounds JUST like any one of my uncles.

One broke three bones in his foot when his canoe fell on it - and then he STILL dragged the thing over a quarter mile, ALONE, fished for four hours, then dragged two coolers of water/fish and the canoe back to the truck, loaded it all and then went home to clean the fish before he went to the hospital.

It swelled enough to split the skin on his ankle...

"But they were biting!!" [lol]

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Oualawouzou
Angels Wii Have Heard on High


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quote:
Originally posted by Ganzfeld:
I disagree that this disproves the myth entirely. There are many diferent kinds of "quicksand" including some that is sand with lots of air in it. If it were deep, one may be able to sink quickly and deeply. I doubt that the myth is true but a few experiments aren't quite enough.

I admit not being an expert in this field, but there are at least three words to describe similar things: quicksands, marshes, bogs. Maybe situations like the one you describe pertains to another of those similar, yet probably slightly different types of... er... perils?

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Le champignon arrive.

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Ganzfeld
Let There Be PCs on Earth


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Recent (2004) experiments with dry quicksand showed that it could swallow even lightweight things in a instant:
http://stilton.tnw.utwente.nl/dryquicksand/

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abigsmurf
We Wish You a Merry Giftmas


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you would sink in quicksand caused by airbubbles as the bubbles give the grains more freedom to move and as such the sand starts to share properties with a liquid. As sand is denser and has a thicker consistancy than water it would be impossible to swim through it.

There's also another effect (I forget its name) where if you vibrate mixed freely moving particles/objects together they'll naturally settle into layers with the biggest, heaviest particless at the bottom.

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jimmy101
The First USA Noel


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quote:
Originally posted by abigsmurf:
you would sink in quicksand caused by airbubbles as the bubbles give the grains more freedom to move and as such the sand starts to share properties with a liquid. As sand is denser and has a thicker consistancy than water it would be impossible to swim through it.

There's also another effect (I forget its name) where if you vibrate mixed freely moving particles/objects together they'll naturally settle into layers with the biggest, heaviest particless at the bottom.

<SNARK ATTACK>
Never studied physics eh?
quote:
you would sink in quicksand caused by airbubbles as the bubbles give the grains more freedom to move and as such the sand starts to share properties with a liquid
"Quicksand" is generally considered to be a mixture of water and sand. The "freedom to move" is relevant to quicksand acting like a liquid but irrelevant as to if a particular object will sink or float. Adding air to quicksand will lower the density (mass per unit volume). Things sink in a liquid when their density (mass per unit volume) is greater than the liquids density (the liquids mass per unit volume).
quote:
... if you vibrate mixed freely moving particles/objects together they'll naturally settle into layers with the biggest, heaviest particles at the bottom.
Again, things sink or float because of density (which is mass per unit volume) not because of how big they are or even how heavy the are. An aircraft carrier is very big and very heavy but it does not sink. So, if you vibrate a mixture of gravel the densest material settles to the bottom, not the biggest or heaviest. Why, because it is density (density = mass/volume) that matters.

Got that?

Remember, density=mass/volume, is what matters.
</SNARK ATTACK>

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