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YT video: A pool filled with non-Newtonian fluid.
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Posting Junkie
Join Date: Jun 2003
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Video of a pool filled with a non-Newtonian fluid.
And yes, you can try this at home, with a bowl, a spoon and 50¢ worth of ingredients.
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Wooo! Perfect science fair activity 
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I'm a bird. I am the 1% (of pets).
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Posting Junkie
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Originally Posted by Eriamjh 
Pool full of Jello?
Nope.
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Professional Poster
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Originally Posted by The Godfather
Corn starch + water
Ahhh...beat me to it. The professor in my Materials Engineering course had some of this in a tupperware dish and did that with his finger. We had no idea what it actually was, so we recoiled in horror when he licked his finger off...then he told us it was just corn starch and water.
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Senior User
Join Date: May 2005
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So that's how Jesus did it. Sweet!
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Administrator  Join Date: Apr 2001
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Jesus knew where the rocks were...
I remember seeing a demonstration of how cornstarch is "different" a long time ago. In about 6th grade, in fact. For me that's a LONG time ago...
It's still VERY cool!
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Glenn -----OTR/L, MOT, Tx
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Baninated
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wow! i wanna do that in the bath!
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Baninated
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i just tried some.. but it seems you need a lot of powder
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Mac Elite
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That is crazy. I saw something like that on a show called Brainiac once. They walked on custard. Same basic idea, I suppose.
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So that's how Jesus walked on water.
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Baninated
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Originally Posted by Tuoder
That is crazy. I saw something like that on a show called Brainiac once. They walked on custard. Same basic idea, I suppose.
but i think he got stuck and had to be pulled out
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Moderator Emeritus
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For those of us who’d probably fail Physics 101 in kindergarten, could someone give a simplified explanation of Eug’s graphic in the first post? It don’t make no sense to me. How exactly do they do that? Just mix half a ton of corn starch with half a ton of water or what?
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Originally Posted by Oisín
For those of us who’d probably fail Physics 101 in kindergarten, could someone give a simplified explanation of Eug’s graphic in the first post? It don’t make no sense to me. How exactly do they do that? Just mix half a ton of corn starch with half a ton of water or what?
Follow the link that Eug gave to the Wikipedia explanation.
"The application of force - for example by stabbing the surface with a finger, or rapidly inverting the container holding it - leads to the fluid behaving like a solid rather than a liquid. More gentle treatment, such as slowly inserting a spoon, will leave it in its liquid state. Trying to jerk the spoon back out again, however, will trigger the return of the temporary solid state."
Basically if you hit the stuff hard (stamp your feet) is gets more viscous (stiffer) and you can walk on it, but if you leave it alone (stand still), it is less viscous (runnier), and you sink.
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Chris. T.
"... in 6 months if WMD are found, I hope all clear-thinking people who opposed the war will say "You're right, we were wrong -- good job". Similarly, if after 6 months no WMD are found, people who supported the war should say the same thing -- and move to impeach Mr. Bush." - moki, 04/16/03
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Follow the link that Eug gave to the Wikipedia explanation.
Ah, I see. Well, I never claimed to be able to pass Kindergarten Basic Reading Skills 101, either...
(Thanks)
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Baninated
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Originally Posted by Buckaroo
So that's how Jesus walked on water.
The Holy Ghost is obviously made of cornstarch.
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Posting Junkie
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Originally Posted by Kevin
The Holy Ghost is obviously made of cornstarch.
 
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Anyone can walk on regular water. You just wait 'til it's January and thick enough.
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"Yields a falsehood when preceded by its quotation" yields a falsehood when preceded by its quotation.
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Originally Posted by Oneota
Anyone can walk on regular water. You just wait 'til it's January and thick enough.
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Custard, however, has a wobbly crust and a more creamy inside. The corn starch mix is visibly all gooey throughout, homogeneous.
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It's fun (in a geeky way) to play with cornflour / cornstarch and water. You can obviously do it with much smaller quantities than this.
If you constantly roll it quickly between your hands it remains as a solid ball. As soon as you stop, it runs through your fingers.
If pour some onto a plate and push your finger through it quickly it shatters and breaks up into chunks, which then "melt" and close in behind your finger.
Just experiment until you get the consistency right. Sort of thickish, but still pourable, cream is what you want.
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