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surface volume scaling law
In mathematics, a surface is any object that locally (if you zoom in close enough to it) looks like a piece of a flat plane. A sphere, a torus, a pseudosphere, and a Klein bottle are examples of different types of surface.

Surface volume scaling law

By the surface volume scaling law, fine structures have relatively more surface to their volume. In the illustration here, each die weighs 2g (0.07oz) and has 9cm2 (1.4in2) of surface. The sugar lump is made of 0.5mm (0.02in) grains and has about 200cm2 (31in2) of total surface. The 2g of "molecular sieve" on the watchglass is porous to the molecular level and has a remarkable 1,500m2 (16,150 sq ft) of total effective surface area.

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