Neutrino - A very small system, such as an
Neutron - An electrically neutral
elementary particle. A neutron is 1839 times heavier than an
Nonthermal Particle - A particle that is not part of a
thermal gas. These particles cannot be described by a
Nonthermal Radiation - Radiation emitted by nonthermal
Nuclear physics - The study of the atom's nucleus,
and the interactions of its parts.
Nucleon - Any particle, such as a proton or
neutron, in the nucleus of an atom.
Nucleus - The positively charged core of an
atom, consisting of protons and neutrons (except for hydrogen),
around which electrons orbit.
Nucleus (pl. nuclei) - The center of an atom, consisting
of one or more protons and associated neutrons.
N-Type Semiconductor - Semiconductor in which current is
carried by electrons.
Net Force - Vector sum of forces on object.
Neutral - Object that has no net electric
Newton - SI unit of force.
Newton’s Law of Motion - Laws relating force and
Node - Point where disturbances caused
by two or more waves result in no displacement.
Normal - Perpendicular to plane of
Normal Force - Force perpendicular to surface.
Nuclear Equation - Equation representing a nuclear
Nuclear Fission - Reaction in which large nucleus
splits into two parts, often approximately equal in mass.
Nuclear Fusion - Reaction in which two nuclei are
combined into one.
Nuclear Reaction - Reaction involving the strong
force in which the number of protons or neutrons in a nucleus
Nuclear Reactor - Device in which nuclear fusion is
used to generate electricity.
Nuclear Transmutation - Change of one nucleus into
another as the result of a nuclear reaction.
Nuclide - Nucleus of an Isotope.