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Online Physics Glossary
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Word Meaning Remarks
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 charge.
Neutrino Chargeless, massless, subatomic particle emitted with beta particles; type of lepton.
Neutron Subatomic particle with no charge and mass slightly greater than that of proton; type of nucleon.
Newton SI unit of force.
Newton’s law of motion Laws relating force and acceleration.
Node Point where disturbances caused by two or more waves result in no displacement.
Normal Perpendicular to plane of interest.
Normal force Force perpendicular to surface.
Nuclear equation Equation representing a nuclear reaction.
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 changes.
Nuclear reactor Device in which nuclear fusion is used to generate electricity.
 
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