Paper Title: Several physical problems related to observations of eruptions and flares on the Sun Author List: Veselovsky, I. Abstract: 1.Interpretations of observations regarding 3D geometry. 2.Dimensionless scaling analysis of measured and inferred parameters: diversity and similarity in the energy, momentum and mass transports for observed events. 3.Evaluation of the role of physical processes beyond standard ideal and dissipative MHD approaches: kinetics, radiation, electrostatics. 4.Investigation of extreme situations on the Sun with low and high activity. 5.Approach to actual predictability limits imposed by known non-local and non-linear couplings in the solar atmosphere and interiors. I am especially interested in the synthesis of the knowledge gained by WGs 1-8. Poster: Yes