ear combination of elementary, "pure" eigenstates.[80]Another matrix serves as a key tool for describing the scattering experiments that form the cornerstone of experimental particle physics: Collision reactions such as occur in particle accelerators, where non-interacting particles head towards each other and collide in a small interaction zone, with a new set of non-interacting particles as the result, can be described as the scalar product of outgoing particle states and a linear combination of ingoing particle states.  The linear combination is given by a matrix known as the S-matrix, which encodes all information about the possible interactions between particles.[81]සාමාන්‍ය ක්‍රම[සංස්කරණය]A general application of matrices in physics is to the description of linearly coupled harmonic systems. The equations of motion of such systems can be described in matrix form, with a mass matrix multiplying a generalized velocity to give the kinetic term, and a force matrix multiplying a d