Скачать или смотреть Why Do Skittles Do This In Water?

In this video I show you an awesome trick to do with skittles. You place skittles around a plate and then pour water on them to make this awesome trick happen. You let the water dissolve the sugar and coloring in the skittles. Then the sugar and coloring begin to diffuse into the water. Since the sugar water is denser than the water it moves toward the lowest portion of the plate quickly. This is why you see these nice streaks of color. Diffusion and gravity work together to make this trick awesome! I describe how the diffusion of the coloring and sugar follow Fick’s law of diffusion. Then I describe how convection is much faster than diffusion.

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