DIY oobleck on a speaker

February 10, 2009 at 11:34 am | | nerd, science@home

Remember those Oobleck fingers in PRL? I finally got around to trying it at home.


And a video (more below):

My cousin and I bought a crappy old speaker to $3, tore off the cover, and spread a thin polyethylene bag (like the bags you put vegetables in at the grocery store). We used a free waveform generating software to apply sinusoidal waves at a range of frequencies—anywhere from 10-200 Hz had an effect. The oobleck was just a mixture of corn starch and water.

I was totally surprized that we actually saw those strange finger things! They weren’t as cool as in the PRL paper, but ours was a fairly ghetto setup. I couldn’t get those persistent holes to form, but whatev.

Here are the rest of the videos.

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  1. Cool, now write a crappy paper about it in a European journal!

    Comment by anon — February 18, 2009 #

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