Dean Campbell's blog

Polypropylene and the Cold Snap

Dean Campbell | Sat, 02/20/2021 - 10:43

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Cold weather brings about the opportunity to demonstrate glass transition temperatures of polypropylene containers.

Lycopodium Powder “Dragon Sneeze” Blocked with a Face Mask

Dean Campbell | Mon, 06/22/2020 - 08:20

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The purpose of this variation on the “dragon’s breath” demonstration is to illustrate that face masks can diminish the movement of particles in the air, an important idea in public health.

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