Article of the week

A twist on the candle mystery

In a classic demonstration of the candle mystery, three lit candles of different heights are covered with a gas jar (see figure 1) and the tallest candle goes out first. This happens because carbon dioxide produced from burning has a higher temperature, so it rises and accumulates at the top of the…

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Science in a toilet-paper roll

On a roll: a humble roll of toilet paper can be used in science experiments explore diverse topics in materials science, chemistry, and physics.

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Starch: a structural mystery

A string of glucose molecules: starch. It sounds simple, but it isn’t. Dominique Cornuéjols and Serge Pérez explore the intricacies of its…

         


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