When this process occurs in two dimensions, four separatrices (“seh-puh-RAY-trih-sees”) enclose two high-powered exhausts traveling in opposite directions. The “interchange” form of this process creates rapidly propagating S-shaped kinks at the boundaries of the open field, which are called “switchbacks.” This process occurs in “tearing mode” instabilities, (15[1])which are the nonideal analog of kink modes. When the diffusion term “eta del squared (*) B” dominates the induction equation, this process can bring two anti-parallel current sheets together. The Petschek (10[1])model (10[1])of this (10[1])process improves upon the Sweet-Parker (10[1])model at high Lundquist (-5[1])numbers, explaining the “fast” form of this process. (-5[1])For 10 points, ideal MHD (-5[1])fails to explain what primary cause of solar flares, (10[1])in which magnetic field lines in a plasma intersect? (10[1])■END■ (10[1])