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In general, most card games, board games, parlor games, and multiple team sports play in a clockwise turn rotation in Western Countries and Latin America and there is typically resistance to playing counterclockwise. Traditionally, and for the most part today, turns pass counterclockwise in many Asian countries.
Dextrorotation and laevorotation (also spelled levorotation) [1] [2] in chemistry and physics are the optical rotation of plane-polarized light.From the point of view of the observer, dextrorotation refers to clockwise or right-handed rotation, and laevorotation refers to counterclockwise or left-handed rotation.
With puller tail-rotors, that is wind from the same side as the tail rotor. For main rotors with clockwise rotation (European), that is wind from 3 o'clock. For main rotors with counter-clockwise rotation, that is wind from 9 o'clock. Analysis of flight test data verifies that the tail rotor does not stall.
In the case of a plane simple closed curve (that is, a curve in the plane whose starting point is also the end point and which has no other self-intersections), the curve is said to be positively oriented or counterclockwise oriented, if one always has the curve interior to the left (and consequently, the curve exterior to the right), when ...
The counterclockwise-rotating vector (cos t, sin t) has a positive frequency of +1 radian per unit of time. Not shown is a clockwise-rotating vector (cos (−t), sin (−t)) which has a negative frequency of -1 radian per unit of time. Both go around a unit circle every 2π units of time, but in opposite directions.
To properly fasten or unfasten a screw, one applies the above rules: if a screw is right-handed, pointing one's right thumb in the direction of the hole and turning in the direction of the right hand's curled fingers (i.e. clockwise) will fasten the screw, while pointing away from the hole and turning in the new direction (i.e. counterclockwise ...
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rotates points in the xy plane counterclockwise through an angle θ about the origin of a two-dimensional Cartesian coordinate system. To perform the rotation on a plane point with standard coordinates v = (x, y), it should be written as a column vector, and multiplied by the matrix R: