## what is rotation:

The term rotation means twist, turn or roll around an axis, alternation or variation and therefore the object or person returns to its original position when performing a full turn or cycle, being able to perform several full turns. The rotation is used in various areas.

## Types of rotations

, Rotation is the action which consists of alternate action of a person or a thing in a place, for example, in volleyball, rotation of the players on the pitch is mandatory, also in a work, Manager can create the working hours of their employees with rotations in their jobs.

Also exists, in terms of business, inventory rotation or rotation of stock, which corresponds to the average frequency of renewal of stocks considered, during a given time and is a parameter of management control of the logistic function or the Sales Department of a company.

In mechanical engineering, the rotation is the one in which all the particles of a body or system of reference described circles or movements of change of direction around a theme that remains fixed, called the axis of rotation.

In mathematics, the rotations are linear transformations which are isometric, i.e., they preserve standards in vector spaces which defined inner product operation and whose matrix has the property of being orthogonal. There are rotations in the plane and rotations in space.

In chemistry, a specific rotation is an angular movement that rotates the plane of polarization of the light passing through it a thickness of 1 dm of a substance whose concentration is 1 g/cm3.

In astronomy, rotation is the circular rotary motion or angular movement of a physical celestial body about its axis. For example, the earth rotates on its own axis to the East and a turnaround of this hard 23 hours, 56 minutes and 4 seconds. There is also the translation, which is the cycle or full rotation of a star around an axis external to this one, for example, the earth revolves around the Sun, and this turnaround lasts little more than 365 days.

In agriculture, crop rotation is the alternation of crop or variety of alternative or simultaneous crops in a field for not exhausting the mineral wealth of the land and avoid diseases that affect one type of plants are perpetuated in a given time. It is an agricultural technique based on the orderly succession of certain crops on the same plot with a two-year or higher rate.

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