natural philosophy - the science of matter and energy and their interactions; "his favorite subject was physics"phase space - (physics) an ideal space in which the coordinate dimensions represent the variables that are required to describe a system or substance; "a multidimensional phase space" containment - (physics) a system designed to prevent the accidental release of radioactive material from a reactor hodoscope - (physics) scientific instrument that traces the path of a charged particle magnet - (physics) a device that attracts iron and produces a magnetic field meniscus - (physics) the curved upper surface of a nonturbulent liquid in a vertical tube nuclear reactor, reactor - (physics) any of several kinds of apparatus that maintain and control a nuclear reaction for the production of energy or artificial elements metastability - the quality of a physical system that persists in its existing equilibrium when undisturbed (or only slightly disturbed) but able to pass to a more stable equilibrium when sufficiently disturbed isotropy, symmetry - (physics) the property of being isotropic; having the same value when measured in different directions wave-particle duality, duality - (physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by wave theory and others by particle theory absorption factor, absorptivity - (physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body reluctivity - (physics) the resistance of a material to the establishment of a magnetic field in it rest mass - (physics) the mass of a body as measured when the body is at rest relative to an observer, an inherent property of the body relativistic mass - (physics) the mass of a body in motion relative to the observer: it is equal to the rest mass multiplied by a factor that is greater than 1 and that increases as the magnitude of the velocity increases gravitational mass - (physics) the mass of a body as measured by its gravitational attraction for other bodies inertial mass - (physics) the mass of a body as determined by the second law of motion from the acceleration of the body when it is subjected to a force that is not due to gravity mass energy - (physics) the mass of a body regarded relativistically as energy flux density, flux - (physics) the number of changes in energy flow across a given surface per unit area quantum - (physics) the smallest discrete quantity of some physical property that a system can possess (according to quantum theory) attracter, attractor - (physics) a point in the ideal multidimensional phase space that is used to describe a system toward which the system tends to evolve regardless of the starting conditions of the system Bose-Einstein statistics - (physics) statistical law obeyed by a system of particles whose wave function is not changed when two particles are interchanged (the Pauli exclusion principle does not apply) Dalton's law of partial pressures, law of partial pressures, Dalton's law - (chemistry and physics) law stating that the pressure exerted by a mixture of gases equals the sum of the partial pressures of the gases in the mixture; the pressure of a gas in a mixture equals the pressure it would exert if it occupied the same volume alone at the same temperature Fermi-Dirac statistics - (physics) law obeyed by a systems of particles whose wave function changes when two particles are interchanged (the Pauli exclusion principle applies) Hooke's law - (physics) the principle that (within the elastic limit) the stress applied to a solid is proportional to the strain produced Kirchhoff's laws - (physics) two laws governing electric networks in which steady currents flow: the sum of all the currents at a point is zero and the sum of the voltage gains and drops around any closed circuit is zero law of gravitation, Newton's law of gravitation - (physics) the law that states any two bodies attract each other with a force that is directly proportional to the product of their masses and inversely proportional to the square of the distance between them law of thermodynamics - (physics) a law governing the relations between states of energy in a closed system | 
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natural philosopher
