V. S. Leonov
It is shown that a relativistic particle has an upper limit of the mass and energy when it is accelerated to the speed of light. Now we can calculate the limiting parameters of the relativistic particles by the use of the normalized relativistic factor in Einstein's relativistic equations. For example, the maximum mass of the relativistic proton is a limited number of 1.1.1012 kg. The state of the relativistic particle is described by a mass balance and an energy balance. The energy balance includes the maximum energy of a relativistic particle and her real energy and her hidden energy. The mass balance includes the maximum mass of a relativistic particle and her real mass and her hidden mass.
PACS numbers: 04.20.-q; 03.30.+p