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  2. Oscillation - Wikipedia

    en.wikipedia.org/wiki/Oscillation

    In addition, an oscillating system may be subject to some external force, as when an AC circuit is connected to an outside power source. In this case the oscillation is said to be driven . The simplest example of this is a spring-mass system with a sinusoidal driving force.

  3. Stokes problem - Wikipedia

    en.wikipedia.org/wiki/Stokes_problem

    The case for an oscillating far-field flow, with the plate held at rest, can easily be constructed from the previous solution for an oscillating plate by using linear superposition of solutions. Consider a uniform velocity oscillation u ( ∞ , t ) = U ∞ cos ⁡ ω t {\displaystyle u(\infty ,t)=U_{\infty }\cos \omega t} far away from the ...

  4. Osculating orbit - Wikipedia

    en.wikipedia.org/wiki/Osculating_orbit

    Osculating orbit (inner, black) and perturbed orbit (red) In astronomy, and in particular in astrodynamics, the osculating orbit of an object in space at a given moment in time is the gravitational Kepler orbit (i.e. an elliptic or other conic one) that it would have around its central body if perturbations were absent. [1]

  5. Cyclic model - Wikipedia

    en.wikipedia.org/wiki/Cyclic_model

    A cyclic model (or oscillating model) is any of several cosmological models in which the universe follows infinite, or indefinite, self-sustaining cycles. For example, the oscillating universe theory briefly considered by Albert Einstein in 1930 theorized a universe following an eternal series of oscillations, each beginning with a Big Bang and ending with a Big Crunch; in the interim, the ...

  6. Foucault pendulum - Wikipedia

    en.wikipedia.org/wiki/Foucault_pendulum

    The relativistic velocity space in Minkowski spacetime can be treated as a sphere S 3 in 4-dimensional Euclidean space with imaginary radius and imaginary timelike coordinate. Parallel transport of polarization vectors along such sphere gives rise to Thomas precession , which is analogous to the rotation of the swing plane of Foucault pendulum ...

  7. Complex harmonic motion - Wikipedia

    en.wikipedia.org/wiki/Complex_harmonic_motion

    In physics, complex harmonic motion is a complicated realm based on the simple harmonic motion.The word "complex" refers to different situations. Unlike simple harmonic motion, which is regardless of air resistance, friction, etc., complex harmonic motion often has additional forces to dissipate the initial energy and lessen the speed and amplitude of an oscillation until the energy of the ...

  8. RKKY interaction - Wikipedia

    en.wikipedia.org/wiki/RKKY_interaction

    The RKKY interaction is a long-range interaction between magnetic moments in a metal. The energy oscillates with distance, decaying as .The oscillations are caused by the interaction of the magnetic moments with the conduction electrons in the metal.

  9. Newton's cradle - Wikipedia

    en.wikipedia.org/wiki/Newton's_cradle

    When one sphere at the end is lifted and released, it strikes the stationary spheres, compressing them and thereby transmitting a pressure wave through the stationary spheres, which creates a force that pushes the last sphere upward. The last sphere swings back and strikes the stationary spheres, repeating the effect in the opposite direction.