Drip (physical)
In Physical, a drop is an minor amount of Liquide, where the Surface stress is important. There exists a very great diversity of the shape of drop (spherical, in tear etc). They are the forces applied to this system which determines the form of it.
For the small drops of water (lower than 3 mm), the surface stress is the dominant force. The drop thus adopts a spherical form where the pressure of Laplace is equal in each point of surface. The spherical structure is in this case the single form for which one reaches the balance of the forces. Other forces can intervene, like the weight, the hydrodynamic convection (in the formation of trail) which will modify the constraints undergone by the drop, and thus its form.
Liquid drop model
In Nuclear physics, the Liquid drop model is used to describe the atomic nucleus simply, historically the first used.
See too
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