rotation counter

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• Rotation of axes — is a form of Euclidean transformation in which the entire xy coordinate system is rotated in the counter clockwise direction with respect to the origin (0, 0) through a scalar quantity denoted by θ.With the exception of the degenerate cases, if a …   Wikipedia

• Counter-rotating propellers — Not to be confused with Contra rotating propellers. Counter rotating propellers Opposite propeller blade section can be clearly seen on this Piper PA 44 Seminole Counter rotating propellers, found on twin and multi engine propeller driven… …   Wikipedia

• Rotation matrix — In linear algebra, a rotation matrix is a matrix that is used to perform a rotation in Euclidean space. For example the matrix rotates points in the xy Cartesian plane counterclockwise through an angle θ about the origin of the Cartesian… …   Wikipedia

• Counter-electromotive force — The counter electromotive force also known as back electromotive force (abbreviated counter EMF, or CEMF)[1] is the voltage, or electromotive force, that pushes against the current which induces it. CEMF is caused by a changing electromagnetic… …   Wikipedia

• Stellar rotation — is the angular motion of a star about its axis. The rate of rotation can be measured from the spectrum of the star, or by timing the movements of active features on the surface.The rotation of a star produces an equatorial bulge due to… …   Wikipedia

• Earth's rotation — is the rotation of the solid Earth around its own axis. The Earth rotates towards the east, which can be observed by orientation with a magnetic compass at sunrise. As viewed from the star Polaris, the Earth turns counter clockwise. Rotation… …   Wikipedia

• direction of rotation —   n.    the direction a combination lock dial is to be turned when the combination is worked. It usually is specified as clockwise (CW) or right (R), or counter clockwise (CCW) or left (L) …   Locksmith dictionary

• Complex number — A complex number can be visually represented as a pair of numbers forming a vector on a diagram called an Argand diagram, representing the complex plane. Re is the real axis, Im is the imaginary axis, and i is the square root of –1. A complex… …   Wikipedia

• Square dance tip — In Modern Western square dance each dance round, called a tip, typically consists of two dances. The first dance part is known as a hash call and the second one is a singing call. In between there s a short break, while the caller prepares for… …   Wikipedia

• Universal Atomic 4 — The Universal Atomic 4 is a four cylinder, 64.46 cubic inch, convert|30|hp gas engine produced by the Universal Motor Company between 1947 and 1984 for use as auxiliary power on sailboats. Over 40,000 of the engines were produced during that time …   Wikipedia

• Coriolis effect — For the psychophysical perception effect, see Coriolis effect (perception). Classical mechanics Newton s Second Law …   Wikipedia