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Sarah Kong's picture

Traxoline

Wed, 02/26/2014 - 11:22 -- Sarah Kong

It's interesting to me how a word can define a class. The longer I teach, the more excited and quickly I can cover a concept. However, this pace does not necessarily fit well with my students, so we have a code word:  Traxoline (thanks to Judy Lanier).

Tom Kuntzleman's picture

Nail Bottle Demonstration in Slow Motion

Fri, 02/21/2014 - 11:27 -- Tom Kuntzleman

The nail bottle demonstration is one that many of us have conducted in our classes. To perform this demonstration, 2 – 3 mL of ethanol is placed into a plastic bottle that has two nails punctured into opposite sides of the bottle. After stoppering the bottle, a Tesla coil is touched to one of the nails. A spark jumps from one nail to the other, which initiates the combustion of vaporized ethanol inside the bottle. We recently filmed this reaction with our high speed video camera.

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