from which it is given under consideration of the first equation (14):
Finally, the momentum is according to (10):
If we summarize everything, we come to the result:
If a body whose state at rest is given by the variables , is adiabatically brought to velocity , then the state variables assume the value:
These equations are in agreement with the results of the paper of Planck. Besides thermodynamics, Planck used the relativity principle, while stating equation (10) for momentum is essential in our work.
- Berliner Berichte, 1907, p. 542.