2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/103963A {\it heuristic} approach is proposed to estimate the average speed of particles during binary encounters by using the macroscopic variables with their extended gradient-type which are the fundamental independent variables in {\it extended thermodynamics} theory. We also address the missing contribution (say, due to creation of new particles : {\it Acoustons}) in conventional Bremsstrahlung.Submitted for Publication; 7 pagesGeneral Physicstext