Pressure II Segment 12: Pressure Snacks

from Everyday Science · host PSD10 and Little Shop of Physics

We close the episode with two treats that rely on pressure: popcorn and juice boxes. What do you use to drink from a juice box? A straw! And you use a straw by creating pressure differences: when you draw air into your mouth, you are creating lower pressure, which brings the liquid up the straw. And how do you make popcorn? You increase the pressure in the kernels by heating them. When they are heated, the water inside tries to expand, and it "pops" the corn by doing so.

Episode metadata supplied by the publisher feed · Published Apr 30, 2010

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