The Rotation (disambiguation) reference article from the English Wikipedia on 24-Apr-2004 (provided by Fixed Reference: snapshots of Wikipedia from wikipedia.org)

Rotation (disambiguation)

The term rotation can be used in several way and includes various topics. Generally, it's used to denote the rotation of movement of a rigid body in such a way that any given point of that body remains at a constant distance from some other fixed point

More specifically, it is applicable to:

• The farming pratice of crop rotation.
• The business management approach of job rotation.
• The International Earth Rotation and Reference Systems Service monitors the Earth's rotation.

In science:

• The differential rotation of objects.
• The Galaxy rotation problem concening discrepancy between the observed rotation.
• The optical rotation polarization.
• The reverse rotation effect being an optical illusion.
• The rotation curve for the variation in a circular orbital.
• The synchronous rotation of orbiting bodies.

In geometry and math:

• The axis, such that a geometric figure can be rotated.
• A coordinate rotation is the transformation of coordinate systems.
• An improper rotation producing an inversion.
• The symmetry of an operation which rotates an object using a point on that object as its center.

In music:

• An order operation that may be performed on a set of pitcheses or pitch classes, where the last member is placed first. Sets which may be mapped onto each other through rotation are rotationally equivalent.

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