Physics

Items

• neutron

  A neutral subatomic particle found in atomic nuclei, with a mass slightly greater than a proton.
• nitrogen

  A colorless, odorless, inert gas making up about 78% of Earth's atmosphere. Symbol: N, Atomic number: 7.
• node

  A point in a wave or standing wave where amplitude is zero; also used in graphs and network theory.
• normal

  A line or vector perpendicular to a surface; in statistics, also refers to the "normal distribution" (bell curve).
• notation

  A system of characters, symbols, or abbreviated expressions used in an art or science or in mathematics or logic to express technical facts or quantities
• nuclear

  Of or relating to the atomic nucleus
• nucleon

  A proton or neutron especially in the atomic nucleus
• nuclide

  A species of atom characterized by the constitution of its necleus and hence by the number of protons, the number of neutrons, and the energy content.
• number

  An arithmetical value, expressed by a word, symbol, or figure, representing a particular quantity and used in counting and making calculations
• numerator

  The part of a fraction that is above the line and signifies the number to be divided by the denominator.
• observation

  An act of recognizing and noting a fact or occurrence often involving measurement with instruments.
• obstacle

  Something that impedes progress or achievement.
• octet

  A group of eight people or things.
• ohmmeter

  An instrument for measuring electrical resistance
• opaque

  Not transparent.
• optics

  A science that deals with the origin and propagation of light, the changes that it undergoes and produces, and other phenomena closely associated with it.
• orbital

  Of, relating to, or forming a circular path (such as the orbit of a moon, planet, or spacecraft).
• origin

  The point at which something begins or rises or from which it derives.
• oscillation

  The action or state of moving or travelling back and forth between two points
• oscilloscope

  An instrument in which the variations in a fluctuating electrical quantity appear temporarily as a visible wave form on a display screen
• overtone

  Any resonant frequency that is higher than the fundamental frequency of a vibrating object or sound source.
• oxidise

  To combine with oxygen; to remove one or more electrons from an atom, ion or molecule
• oxygen

  A chemical element with atomic number 8 that constitutes 21 percent of the Earth's atmosphere, that is capable of combining with all elements except some noble gases, that is active in physiological processes of almost all known organisms, and that is involved especially in combustion
• parabola

  A plane curve generated by a point moving so that its distance from a fixed point is equal to its distance from a fixed line : the intersection of a right circular cone with a plane parallel to an element of the cone
• parallel

  Extending in the same direction, everywhere equidistant