2026-07-072026-07-07http://salesiana.dossiersoluciones.com/handle/123456789/118935In this paper I discuss the extension of the analogy between gravitation and some systems of condensed matter physics from kinematics to dynamics. I will focus my attention on two applications of the analogy to the dynamics of fluids that have been recently proposed: the study of backreaction effects and the calculation of the depletion in Bose-Einstein condensates, showing how this extension is possible and stressing the main differences with respect to the gravitational context. I will conclude with some remarks about the actual reliability of the proposed scheme, pointing out the basis issues that have still to be addressed.8 pages; Talk given at ISSP (Erice, September 2006); to appear on World ScientificGeneral Relativity and Quantum CosmologyOther Condensed MatterHigh Energy Physics - Theorytext