Rotation (disambiguation)

From Free net encyclopedia

The term rotation can be used in several ways and includes various topics. Generally, it is used to denote (in 3D) 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 fixed line (in 2D: point).

More specifically, it is applicable to:

• The farming practice of crop rotation.
• The business management approach of job rotation.
• The retail practice of rotating stock (especially fresh produce/bread) to ensure the stock with the soonest sell by date is at the front of the shelf - meaning it will be sold first.

In physics:

• The differential rotation of objects.
• The optical rotation polarization.

In anatomy:

• The motion of a body part about its axis.

In geometry and mathematics:

• A transformation in the rotation group
• A coordinate rotation is the transformation of coordinate systems.
• An improper rotation producing an inversion.

In music:

• An order operation that may be performed on a set of pitches or pitch classes, where the last member is placed first. Sets which may be mapped onto each other through rotation are rotationally equivalent. See: transformation, permutation
• In music radio, the term refers to how often a song is played. See spin (radio).

Other:

• Rotation is also the name of a billiards game.

• In baseball pitching, the rotation is the group of starting pitchers for a team, and the order in which they pitch.

• The Rotation Speed of an aircraft is the speed required at take-off for the nose to begin lifting off the runway.

• In elections, Robson Rotation is the practice of printing multiple ballots for an election, each having the candidates listed in a different order.

de:Rotation it:Rotazione nl:Rotatie

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