The phonons in sound waves are considered as independent examples of these systems in the Debye model for specific heat. The Morse potential is used to measure deviation from these systems in infrared spectroscopy. Angular frequency times the ratio of energy stored to power lost gives these systems' Q-factor, which quantifies their level (-5[1])of damping. Since applying the small angle approximation allows them to be modeled with Hooke’s law, pendulums can be modeled as these systems. For 10 points, name these systems which exhibit periodic sinusoidal movement, whose ■END■