Physics

Items

• paramagnetism

  Being or relating to a magnetizable substance (such as aluminum) that has small but positive susceptibility which varies little with magnetizing force
• parameter

  Any of a set of physical properties whose values determine the characteristics or behavior of something
• particle

  A relatively small or the smallest discrete portion or amount of something
• pattern

  Frequent or widespread incidence
• pendulum

  A body suspended from a fixed point so as to swing freely to and fro under the action of gravity and commonly used to regulate movements
• period

  A portion of time determined by some recurring phenomenon
• permeable

  Capable of being penetrated; having pores and openings that allow liquids or gases to go through
• permittivity

  The ability of a material to store electrical potential energy under the influence of an electric field measured by the ratio of the capacitance of a capacitor with the material as dielectric to its capacitance with vacuum as dielectric
• perpendicular

  Standing at right angles to the plane of the horizon : exactly upright
• phase

  The point or stage in a period of uniform circular motion, harmonic motion, or the periodic changes of any magnitude varying according to a simple harmonic law to which the rotation, oscillation, or variation has advanced from its standard position or assumed instant of starting
• phenomenon

  A fact or event of scientific interest susceptible to scientific description and explanation
• photoelectric

  Involving, relating to, or utilizing any of various electrical effects due to the interaction of radiation (such as light) with matter
• photon

  A quantity of electromagnetic radiation
• photosphere

  A sphere of light or radiance; The luminous surface layer of the sun or a star
• photovoltaic

  Of, relating to, or utilizing the generation of a voltage when radiant energy falls on the boundary between dissimilar substances (such as two different semiconductors)
• physics

  A science that deals with matter and energy and their interactions
• pion

  A meson that is a combination of up and down quarks and antiquarks, that may be positive, negative, or neutral, and that has a mass about 270 times that of the electron
• piston

  A sliding piece moved by or moving against fluid pressure which usually consists of a short cylindrical body fitting within a cylindrical chamber or vessel along which it moves back and forth
• pitch

  A property of a sound that is determined by the frequency of the waves producing it : highness or lowness of sound
• pivot

  A shaft or pin on which something turns
• plane

  A surface in which if any two points are chosen a straight line joining them lies wholly in that surface
• plasma

  An electrically conducting medium in which there are roughly equal numbers of positively and negatively charged particles.
• plasmasphere

  A torus-shaped region in the inner magnetosphere that contains a dense and cold plasma.
• plastic

  Any of numerous organic synthetic or processed materials that are mostly thermoplastic or thermosetting polymers of high molecular weight and that can be made into objects, films, or filaments
• point

  A particular place