aerogel atom boiling point claude-louis navier colloid condensed matter physics conservation of mass continuum mechanics cooling curve deformation degenerate matter equation of state fermionic condensate finite strain theory fluid fluid dynamics fluid mechanics fluid statics gas george gabriel stokes infinitesimal strain theory isaac newton kilogram linear elasticity liquid list of states of matter materials science melting point molecule newtonian fluid non-newtonian fluid phase transition physics position quark-gluon plasma rheology robert hooke shear modulus solid-state chemistry solid-state physics solid mechanics space state of matter strange matter supercritical fluid superfluid supersolid surface tension tensor thermal energy triple point viscoelasticity viscosity volume