The Engineering of a Disposable Diaper
Bill reveals the stunning engineering underlying the design of a diaper. He describes the five layers of a diaper, including the superabsorbent polymer in the diaper's core. He illustrates the action of this polymer with a stunning demonstration using a single bead of polymer: it soaks up enough water to grow from a diameter of 4 mm to nearly a half inch.
You can bundle watch Bill's videos using this playlist:
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If you are interested in mechanical computers you'll likely enjoy his series on Albert Michelson's Harmonic Analyzer -- a 19th century machine that calculates Fourier transforms:
• Albert Michelson's Harmonic Analyzer
Creative Commons Images Used in Video
First cotton image is by dotlizard
https://www.flickr.com/photos/dotliza...
The cotton candy image is from Stefano Mortellaro
https://www.flickr.com/photos/fazen/7...
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