|the latter would have higher density due to their smaller size

If we model the blueberries as regularly packed spheres tiling an infinite volume, the volume fraction of air should be constant with the berry radius. Is there something I’m missing?

]]>It’s counter-intuitive, but the packing density doesn’t change with the scale of an object. Small spheres pack at the same density as large spheres.

Density is a dimensionless measure. Imagine a picture of packed circles, but you don’t know the scale. You can still calculate the density, right? So when you find out each circle has a radius of 1km, or 1mm, it doesn’t change the density you calculated initially.

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