Periodic events and periodic motion have long served as standards for units of time.
From the en.wikipedia.org
Instead of the slow periodic motion he'd been expecting, he saw frantic, jerky eye movements.
From the newscientist.com
Thus, simple harmonic motion is a type of periodic motion.
From the en.wikipedia.org
One proposed mechanism for these variations is the periodic motion of our Solar System relative to the main plane of the Milky Way Galaxy.
From the sciencedaily.com
Molecules absorb infrared radiation at frequencies that are at resonance with the periodic motion of charges that changes the molecular dipole moment.
From the nature.com
In mechanics and physics, simple harmonic motion is a type of periodic motion where the restoring force is directly proportional to the displacement.
From the en.wikipedia.org
As of 2009, it has never been observed directly, but its effects on periodic motion of charges in a time-averaged sense is detectable in synchrotrons.
From the en.wikipedia.org
The specific dynamics of this spring-mass system are described mathematically by the simple harmonic oscillator and the regular periodic motion is known as simple harmonic motion.
From the en.wikipedia.org
The periodic behaviour corresponds to a periodic stick-slip motion.