Page 12 - GENERAL PHYSICS 1 DICTIONARY
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UNCERTAINTY PRINCIPLE- Any of a variety of mathematical VACUUM- An area of space which contains no matter.
inequalities asserting a fundamental limit to the precision with
which certain pairs of physical properties of a particle, such as VALENCE ELECTRON- An electron that is associated with an
position x and momentum p, can be known simultaneously. atom and can participate in the formation of a chemical bond.
VALENCE SHELL- the outermost electron shell of an atom.
UNIFORM MOTION- along a line is the very special kind of
motion that occurs when an object moves with unvarying speed VECTOR- Any quantity that has both magnitude and direction.
in a fixed direction. VECTOR SPACE- A mathematical structure formed by a
collection of elements called vectors, which may be added
UNIFORM CIRCULAR MOTION- is describes the motion of a
body traversing a circular path at constant speed. together and multiplied ("scaled") by numbers called scalars.
VISIBLE LIGHT- A form of electromagnetic radiation generally
UNIT VECTOR- in a normed vector space is a vector (often a defined as the range of wavelengths visible to the average
spatial vector) of length. human eye.
VOLT- The SI derived unit for electric potential, electric
UTILITY FREQUENCY- The frequency of the oscillations of potential difference, and electromotive force, defined as the
alternating current (AC) in an electric power grid transmitted difference in electric potential between two points of a
from a power plant to the end-user.
conducting wire when an electric current of one ampere
dissipates one watt of power between those two points.
VOLMETER- An instrument used for measuring the difference
in electrical potential between two points in an electric circuit.
Analog voltmeters move a pointer across a scale in proportion
to the voltage of the circuit.
