mechanical or physical weathering
When two rocks rub up against each other, pieces of the rock wear away. This is called abrasion.
Usually not, it is mostly the mechanical action of rocks rubbing against each other.
I don't think they exactly have a name for it. Its just called "The Surface". If you want the state of that substance its solid(when the particles are closest to each other) and gaseous(when the particles are farthest from each other). If you want the value of the cross-sectional area you have to give a value in your question. Other than that I don't think its called something other than a surface.
subatomic particleIn physics or chemistry, subatomic particles are the small particles composing nucleons and atoms. There are two types of subatomic particles: elementary particles, which are not made of other particles, and composite particles.
All particles exert some kind of force on other particles.
mechanical or physical weathering
weathering
abrasion
Abrasion.
Abrasion.
Abrasion.
Erosion
Abrasion is the grinding and wearing of rock surfaces through mechanical action of other sand particles.
sound and other mechanical vibrations are quantized as bosonic particles called phonons.
The term weathering normally refers to the breakdown of the surroundings or other artifacts by natural means. It can also refer to other means such as mechanical.
Abrasion.
Abrasion.