Dancing Cornstarch

[Botch]

[nomedia]http://youtube.com/watch?v=Px9jcA4decA[/nomedia]

 

[sideslider]

is that with air?

 

[Deleted member 2349]

Looks like a baking sheet on top of a mid range speaker to me...pretty cool none the less...what makes someone even want to try that.

 

[lytehouse]

Looks like a baking sheet on top of a mid range speaker to me...pretty cool none the less...what makes someone even want to try that.

boredom? too much time on his hands? his 15 mins of fame?

 

[Troubl]

is taht with air?

At the end of the video, it says "metal sheet on top of booming subwoofer".

Pretty trippy looking. Almost looked like people clawing their way out of sand.

 

[sideslider]

ok thanks I couldn't make it to the end :thumbup:

 

[damnpoor]

Here's the scientific version-

[ame="http://www.youtube.com/watch?v=vCHPo3EA7oE"]YouTube - Cornstarch Science[/ame]

 

[Botch]

Here's the scientific version-

Cornstarch Science

Wow, thanks for posting that!
I've been intrigued how cornstarch thickens my stir-frys, and it's also fun to dissolve cornstarch "packing peanuts" in water. Damn, it's like I'm 14 again.

 

[Cloned]

That's what called a non-Newtonian liquid. You can make some with just corn starch and water (play with the ratio to find the right mixture). When a lot of kinetic energy is applied, it acts like a solid. If you don't apply enough kinetic energy or none at all, it stays a liquid. You could actually fill a pool with the stuff and run across it, but as soon as you slow down you'll be able to swim in it (there's a video on youtube of this, it's a Japanese game show or something). For practicality, you can make a bowl of it, then squeeze it in your hand constantly, it will be like a ball of dough, when you stop applying pressure it will turn back into a liquid and run between your fingers.

Cool stuff.

 

[Botch]

That's what called a non-Newtonian liquid. When a lot of kinetic energy is applied, it acts like a solid. If you don't apply enough kinetic energy or none at all, it stays a liquid.

Is that the opposite of a thixotropic substance, like ketchup? When a lot of kinetic energy is applied, it acts like a liquid (shake the bottle to get the ketchup to pour); apply none, and it stays in the bottle ("Anticipation...")

 

[Cloned]

Is that the opposite of a thixotropic substance, like ketchup? When a lot of kinetic energy is applied, it acts like a liquid (shake the bottle to get the ketchup to pour); apply none, and it stays in the bottle ("Anticipation...")

Wish I could tell ya, but I'm no expert. I just remember reading about it and making some of my own to play with.

 

[pedwards89]

Anyone for custard?

[ame="http://www.youtube.com/watch?v=ygtX2miwU5I&NR=1"]YouTube - Brainiac - Jon Tickle Walks on Custard[/ame]