A tickler coil is used with feedback to create an example of these objects named for Armstrong. An unusual nonconservative one named for van der Pol conserves energy as long as the parameter mu is greater than zero. The equation describing a general one of these systems states that the second derivative of x plus omega sub zero squared x equals zero. RLC circuits function as these systems when the square root of L over C is small. Their behavior can be described by a Q f
A tickler coil is used with feedback to create an example of these objects named for Armstrong. An unusual nonconservative one named for van der Pol conserves energy as long as the parameter mu is greater than zero. The equation describing a general one of these systems states that the second derivative of x plus omega sub zero squared x equals zero. RLC circuits function as these systems when the square root of L over C is small. Their behavior can be described by a Q factor when they are (*) driven or damped. One class of them undergoes acceleration proportional to the displacement and is described by Hooke's law; that example is a simple mass on a spring. For 10 points, name these physical systems that periodically moves about an equilibrium point, whose simple harmonic type is exemplified by the pendulum.
A tickler coil is used with feedback to create an example of these objects named for Armstrong.
oscillators [prompt on "resonator"; accept more specific answers, like simple harmonic oscillator, harmonic oscillator, nonconservative oscillator, damped oscillator, driven oscillator, etc]