Day 73: Burning Steel Wool

Wednesday, 4 December 2013

I wanted kids to understand resistance as a function of resistivity, length of the medium, and the medium’s cross sectional area, so we burned steel wool with a 9 volt battery. The experience gave us something to hark back to as we worked through the PhET sim on resistance.

Our notes for the day (though I’m not thrilled with other parts of the document, the resistance part worked well).

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