Continuum Mechanics/Basic Assumptions of Continuum Mechanics

Structure of matter Characteristic sizes of atoms and molecules (on example of hydrogen atom and molecule) Number of molecules in different volumes of different gases in different spaces Distribution of mass Molecules move chaotically Interactions between particles Gravitational (considerable among large objects, almost inconspicuous on molecule level) Weak Strong (considerable only on very short distances, large amount of energy is needed to get such distances) Electromagnetic - exactly what we need Something about how to reduce phenomena of durability and elasticity to Coulomb interactions. Considerable physical and chemical processes Electrodynamics Phase states (examples) Properties of matter and components of compounds Chemical reactions Phase transitions Thermal motion Thermal expansion Viscosity Eradiation Polarization and magnetization Quantum mechanics Statistical and Phenomenological Description of Substances Futility of trying to write a system of equations to every particle Usage of mean, summary or global characteristics is essential. Disadvantages of statistical description due to need of additional sometimes groundless hypotheses Cute phenomenological description Hypothesis of continuity About Space and Time Metric manifolds E.g. 3-dimensional Euclidean space We will not use pseudo Euclidean spaces Absolute time Newton mechanics