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[[File:lighterstill.jpg]][[File:Centrifugal.jpg|right|frame]] ...ious" force) [[observed]] in a non-inertial [[Frame of reference|reference frame]], and a [[reaction]] force [[corresponding]] to a [https://en.wikipedia.or

...:lighterstill.jpg]] [[Image:Relativity of Simultaneity Animation.gif|right|frame|<center>Events A, B, and C occur in different order depending on the motion ...question of whether such events are simultaneous is [[relative]]; in some reference frames the two accidents happen "at the same time", in others, in a differe

[[Image:lighterstill.jpg]] [[Image:Spacetimelargerstill.jpg|right|frame]] ...erefore vary for various events and various [[Frame of reference|reference frame]]s.

[[File:lighterstill.jpg]][[File:Navigation.jpg|right|frame]] ...mponent is the index arm, which is attached to the pivot at the top of the frame. At the bottom is an endless vernier which clamps into teeth on the bottom

[[Image:Time_Piece_1.jpg|right|frame]] ...ue, and mathematical time, in and of itself and of its own nature, without reference to anything external, flows uniformly and by another name is called duratio

[[Image:lighterstill.jpg]][[File:Quantum_mechanics_1a.jpg|right|frame]] ...e (‘co-variant’) form, have the same form in all reference frames, whether inertial or not.

...rivial. A [[vibration]] can be defined as a back-and-forth motion around a reference [[value]]. However, a vibration is not necessarily a wave. Defining the nec [[File:Wave_motion-i18n-mod2b.jpg|right|frame| '''A''' = In deep water.<br /> '''B''' = In shallow water. The elliptical

[[Image:lighterstill.jpg]][[Image:Gforce.jpg|right|frame]] ...se simply from the acceleration of rotating [[Frame of reference|frames of reference]].

[[Image:lighterstill.jpg]][[Image:Gravity_waves_medium.jpg|right|frame]] ...relativity is the [[equivalence principle]], which equates free fall with inertial motion. The issue that this creates is that free-falling objects can accel

[[File:Teaching_buddha_small.jpg|right|frame]] *The Urantia Book as a reference