The physics of floating screwdrivers

I explain how a jet of air can float a common screwdriver.

Plans to make your own fluid turbulence disc: http://makezine.com/projects/rheoscopic-coffee-table/

Support more Applied Science videos: https://www.patreon.com/AppliedScience

Nighthawkinlight's video about floating screwdrivers: https://www.youtube.com/watch?v=fceUcRfbCcQ

Shrinking paper money with ammonia

Support Applied Science on Patreon: https://www.patreon.com/AppliedScience

As a follow-up to my previous video on bending wood, I show how ammonia can shrink paper money.  The money is dipped into liquid anhydrous ammonia, then dried, and the process is repeated about a dozen times.  As the money dries, it shrinks due to the surface tension of the boiling/evaporating ammonia.

Video on bending wood:
https://www.youtube.com/watch?v=9Z0SsAyHKzc
Making aerogel:
https://www.youtube.com/watch?v=X24np30GS2o

Extreme wood bending with ammonia

Bending wood with ammonia is not really DIY, but I show the process, which is extremely effective.  There is also a commercial product that is pre-treated flexible wood, which hardens after being clamped in the desired shape.

http://boingboing.net/2011/05/06/inventables.html
Hmm, it seems the product may no longer be available -- I can't find it at Inventables.
https://www.inventables.com

Pre-treated flexible wood product patent:
https://www.google.com/patents/US5360631

Distilling pure anhydrous ammonia

I have a few upcoming projects that require anhydrous ammonia. In this video, I show how to distill it from "ammonia water" similar to common glass cleaner.
http://en.wikipedia.org/wiki/Birch_reduction
http://www.engineeringtoolbox.com/ammonia-pressure-temperature-d_361.html

Magnetic Propulsion

This is a neat little demo that shows how permanent magnets can be used to create propulsion along a conductive copper track