The need that why dew is a circle arrives deep microcosmic in explanation. Material is comprise by atomic, element, ion, the property that uses the atom in theory, element, ion in the element is very contiguous, but a general designation is an element. There is interaction between the element, pursue as follows, gravitation and repulsion exist at the same time between the element. When the distance between the element is less than R0, repulsion is more than gravitation, join forces expression is repulsion; When the distance between the element is more than R0, gravitation is more than repulsion, join forces expression is gravitation.
A water or a water, meeting existence evaporates near the surface, the distance between the water element that this brings about the surface to be in increases a little a few, the water element near such surfaces can be attracted each other, make surface seem the film of a piece of take up. This film on surface can hold the coin with a bigger than water density in the palm, this film on water should receive the surface that shrink drips to accumulate as far as possible, accumulate with the round face below bulk circumstance the smallest, reason dew can appear piece globose, just can become a few more compressed below the influence in gravity.
Similar phenomenon still has a lot of, of the flap in sky lathery it is globose won't be square, because exterior tension systole expresses the reason of the area,also be.
Because gravitational reason will be a few flatter,dew is in on the ground, arrived what dimensional station water keeps likely approximately perfect is globose. The steel ball that machinery uses, some places are globose to its the requirement is very strict, on the ground very inaccessible so high demand. A few years ago ever somebody has been imagined, go producing in aerospace be close to perfect and globose ball bearing. Although see this kind of think of a way now too too extravagant, but not injudicious also it is a kind of method.
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