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Reference.org
Coupling (physics)
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<p>In <a href="/facts/Physics/a7aH2y08">physics</a>, two objects are said to be coupled when they are interacting with each other. In <a href="/facts/Classical_mechanics/ykG8upsN">classical mechanics</a>, coupling is a connection between two <a href="/facts/Oscillation/6vSrm84a">oscillating</a> systems, such as <a href="/facts/Pendulum/D2hQXwlI">pendulums</a> connected by a spring. The connection affects the oscillatory pattern of both objects. In <a href="/facts/Particle_physics/YgIuyj2t">particle physics</a>, two particles are coupled if they are connected by one of the four <a href="/facts/Fundamental_interaction/WrFEJaFl">fundamental forces</a>. </p>