rotational velocity - Definition. Was ist rotational velocity
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Was (wer) ist rotational velocity - definition

ANGULAR MOTION OF A STAR ABOUT ITS AXIS
Rotation of a star; Projected rotational velocity; Projected rotational velocities
  • This illustration shows the oblate appearance of the star [[Achernar]] caused by rapid rotation.
  • The neutron star (center) emits a beam of radiation from its magnetic poles. The beams are swept along a conic surface around the axis of rotation.
  • This star has inclination <math>i</math> to the line-of-sight of an observer on the Earth and rotational velocity ''v<sub>e</sub>'' at the equator.

Detonation velocity         
CHARACTERISTIC OF EXPLOSIONS
Velocity of detonation; Detonation speed; Explosive velocity
Explosive velocity, also known as detonation velocity or velocity of detonation (VoD), is the velocity at which the shock wave front travels through a detonated explosive. Explosive velocities are always faster than the local speed of sound in the material.
Four-velocity         
ANALOGUE OF VELOCITY IN FOUR-DIMENSIONAL SPACETIME
Four velocity; Velocity Four-Vector; Velocity four-vector; 4-velocity; Four-speed; 4-speed
In physics, in particular in special relativity and general relativity, a four-velocity is a four-vector in four-dimensional spacetimeTechnically, the four-vector should be thought of as residing in the tangent space of a point in spacetime, spacetime itself being modeled as a smooth manifold. This distinction is significant in general relativity.
Particle velocity         
TIME DERIVATIVE OF THE SOUND PARTICLE DISPLACEMENT
Sound velocity level; Particle velocity level; Acoustic velocity; Sound particle velocity
Particle velocity is the velocity of a particle (real or imagined) in a medium as it transmits a wave. The SI unit of particle velocity is the metre per second (m/s).

Wikipedia

Stellar rotation

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 centrifugal force. As stars are not solid bodies, they can also undergo differential rotation. Thus the equator of the star can rotate at a different angular velocity than the higher latitudes. These differences in the rate of rotation within a star may have a significant role in the generation of a stellar magnetic field.

The magnetic field of a star interacts with the stellar wind. As the wind moves away from the star its rate of angular velocity slows. The magnetic field of the star interacts with the wind, which applies a drag to the stellar rotation. As a result, angular momentum is transferred from the star to the wind, and over time this gradually slows the star's rate of rotation.