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Van Allen Belts Two ring-shaped regions that
girdle the Earth's equator in which electrically charged
particles are trapped by the Earth's magnetic field. See South
Atlantic Anomaly or radiation belts.
Valence Band
In a solid, the range of energies
of electrons that are bound to atoms.
Vector Quantity
Quantity having both magnitude
(size) and direction.
Vector Resolution
Process of finding the effective
value of a component in a given direction.
Velocity
Ratio of change in position to
time interval over which change takes place.
Velocity-Time Graph
Plot of velocity of object as a
function of time.
Virtual Image
Point from which light rays
appear to diverge without actually doing so.
Viscous Fluid
Fluid that creates force that
opposes motion of objects through it. The force is proportional
to object’s speed.
Volatile Liquid
Liquid that is easily vaporized. |
