in powers of
, we obtain,
The second term of this expansion corresponds to the kinetic energy of the material particle in classical mechanics.
[11]The emission of energy in radioactive processes is evidently connected with the fact that the atomic weights are not integers. Attempts have been made to draw conclusions from this concerning the structure and stability of the atomic nuclei.
Equations of Motion of Material Particles. From (43) we obtain, by differentiating by the time
, and using the principle of momentum, in the notation of three-dimensional vectors,
