The divergence of this quantity's tensor appears in the momentum equation for a continuum body. Representations of this quantity include Cauchy's matrix and Mohr's circle. The Maxwell tensor gives this quantity for the electromagnetic field. Heuristically equal to the density of strain energy, this quantity is equal to the 
The divergence of this quantity's tensor appears in the momentum equation for a continuum body. Representations of this quantity include Cauchy's matrix and Mohr's circle. The Maxwell tensor gives this quantity for the electromagnetic field. Heuristically equal to the density of strain energy, this quantity is equal to the elastic modulus times the strain according to Hooke's law. Though not pressure, it has SI unit Pascal. For 10 points, name this quantity, the area density of internal forces within an object, that indicates how tense or compressed an object is.
The divergence of this quantity's tensor appears in the momentum equation for a continuum body.
{stress}