## Physics

Of natural science.   May also be referred to as natural philosophy.

The science of matter and energy and their interactions; "his favorite subject was physics".

This concept's ID is @1~32827

### Law

• law of thermodynamics

(physics) a law governing the relations between states of energy in a closed...

• law of gravitation

(physics) the law that states any two bodies attract each other with a force...

• Bose-Einstein statistics

(physics) statistical law obeyed by a system of particles whose wave function...

• Dalton's law

(chemistry and physics) law stating that the pressure exerted by a mixture of gases...

• Fermi-Dirac statistics

(physics) law obeyed by a systems of particles whose wave function changes...

• Gay-Lussac's law

(physics) the density of an ideal gas at constant pressure varies inversely with...

• Hooke's law

(physics) the principle that (within the elastic limit) the stress applied to a solid...

• Kirchhoff's laws

(physics) two laws governing electric networks in which steady currents flow: the...

• Planck's law

(physics) the basis of quantum theory; the energy of electromagnetic waves is contained...

(physics) an equation that expresses the distribution of energy in the radiated...

• principle of relativity

(physics) a universal law that states that the laws of mechanics are not...

### Mass

• rest mass

(physics) the mass of a body as measured when the body is at rest relative to an observer,...

• relativistic mass

(physics) the mass of a body in motion relative to the observer: it is equal to...

• gravitational mass

(physics) the mass of a body as measured by its gravitational attraction for...

• inertial mass

(physics) the mass of a body as determined by the second law of motion from the acceleration...

• mass energy

(physics) the mass of a body regarded relativistically as energy.

### Physical Property

• absorptivity

(physics) the property of a body that determines the fraction of the incident radiation...

• reluctivity

(physics) the resistance of a material to the establishment of a magnetic field in ...

### Density

• flux

(physics) the number of changes in energy flow across a given surface per unit area.

• optical density

(physics) a measure of the extent to which a substance transmits light or other...

### Property

• isotropy

(physics) the property of being isotropic; having the same value when measured in different...

• duality

(physics) the property of matter and electromagnetic radiation that is characterized by...

### Also contains

• astronomy

The branch of physics that studies celestial bodies and the universe as a whole.

• electronics

The branch of physics that deals with the emission and effects of electrons and with...

• nuclear reactor

(physics) any of several kinds of apparatus that maintain and control a nuclear...

• mechanics

The branch of physics concerned with the motion of bodies in a frame of reference.

• magnet

(physics) a device that attracts iron and produces a magnetic field.

• particle physics

The branch of physics that studies subatomic particles and their interactions.

• optics

The branch of physics that studies the physical properties of light.

• aeronautics

The theory and practice of navigation through air or space.

• nuclear physics

The branch of physics that studies the internal structure of atomic nuclei.

• quantum physics

The branch of physics based on quantum theory.

• theory of gravitation

(physics) the theory that any two particles of matter attract one another...

• biophysics

Physics as applied to biological problems.

• cryogenics

The branch of physics that studies the phenomena that occur at very low temperatures.

• attractor

(physics) a point in the ideal multidimensional phase space that is used to describe a...

• phase space

(physics) an ideal space in which the coordinate dimensions represent the variables...

• quantum

(physics) the smallest discrete quantity of some physical property that a system can possess...

• containment

(physics) a system designed to prevent the accidental release of radioactive material...

• field theory

(physics) a theory that explains a physical phenomenon in terms of a field and the...

• crystallography

The branch of science that studies the formation and structure of crystals.

• electromagnetism

The branch of physics concerned with electromagnetic phenomena.

• electrostatics

The branch of physics that deals with static electricity.

• hodoscope

(physics) scientific instrument that traces the path of a charged particle.

• plasma physics

The branch of physics concerned with matter in its plasma phase.

• meniscus

(physics) the curved upper surface of a nonturbulent liquid in a vertical tube.

• metastability

The quality of a physical system that persists in its existing equilibrium when undisturbed...

• Maxwell-Boltzmann distribution law

(physics) a law expressing the distribution of energy among the...

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