For further densification, additional particle movement while the particle undergoes grain-growth and grain-shape changes occurs.

Beneath the potential hill, the particle undergoes exponential changes in amplitude.

Nevertheless because electrons, protons and other particles undergo both weak and electromagnetic interactions the effect of each on the other has to be considered.

The red shift that is detectable is caused by the increase in rest mass that fundamental particles undergo when raised to the higher level.

During impact with the substrate, particles undergo plastic deformation and adhere to the surface.

Also, particles from different environments must have undergone some process of accretion to end up as aggregates composed of different minerals.

On the boundary the velocity of point is transformed as the particle underwent the action of generalized billiard law.

In special relativity, a uniformly accelerating particle undergoes hyperbolic motion.

GRW says that particles can undergo spontaneous wave-function collapses.

It looked as if some process were at work creating a situation analogous to the quantum leaps in energy that nuclear particles undergo.