In a betatron the magnetic flux across an equilibrium orbit of radius \(r=25 \mathrm{~cm}\) grows during the acceleration time at practically constant rate \(\dot{\Phi}=5.0 \mathrm{~Wb} / \mathrm{s} .\) In the process, the electrons acquire an energy \(W=25 \mathrm{MeV} .\) Find the number of revolutions made by the electron during the acceleration time and the corresponding distance covered by it.