The collective behavior of many interacting examples of these systems is described in the Kuramoto model. The expression “mu times the quantity 1 minus x-squared” multiplies x-dot in an ODE describing one of these systems. Long build-ups followed by sudden discharges are characteristic of the “relaxation” type of these systems. Cartwright and Littlewood studied a nonlinear (10[1])one of these systems named for Dutch engineer Balthasar van der Pol. The time evolution of one type of these systems traces an ellipse (10[1])in phase space. The dissipation of one type of these systems is described by their Q-factor. An LC (-5[1])circuit behaves as one of these systems, (10[1]-5[1])as it satisfies the generic differential equation, “mx-double-dot (10[1])equals minus kx.” For 10 points, Hooke’s law describes the “simple harmonic” (10[1])type of what systems? (10[1])■END■ (10[3]0[1])