Physics

(astronomy) the magnitude that a star would have if it were viewed from a distance of 10 parsecs (32.62 light years) from the earth

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

(physics) material in a nuclear reactor that absorbs radiation

(physics) the process in which incident radiated energy is retained without reflection or transmission on passing through a medium; "the absorpt…

(physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body

(physics) the property of a body that determines the fraction of the incident radiation or sound flux absorbed or absorbable by the body

(physics) the ratio of the number of atoms of a specific isotope of an element to the total number of isotopes present

(physics) a rate of increase of velocity

(astronomy) the formation of a celestial object by the effect of gravity pulling together surrounding objects and gases

(astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac

(physics) the maximum displacement of a periodic wave

(physics) the angle that a magnetic needle makes with the plane of the horizon

(physics) the rate of change of the angular velocity of a rotating body

(physics) the rate of change of the angular position of a rotating body; usually expressed in radians per second or radians per minute

(astronomy) position of a planet as defined by its angular distance from its perihelion (as observed from the sun)

(physics) the point of maximum displacement in a periodic system

(astronomy) the point in an orbit farthest from the body being orbited

(astronomy) the rising of a star above the horizon

(astronomy) a cluster of stars (or a small constellation)

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

(physics) a spectrum of radiation caused by electron transitions within an atom; the series of spectrum lines is characteristic of the element

(physics) a point in the ideal multidimensional phase space that is used to describe a system toward which the system tends to evolve regardless…

(physics) a point in the ideal multidimensional phase space that is used to describe a system toward which the system tends to evolve regardless…

(astronomy) the equinoctial point that lies in the constellation of Virgo

(physics) a unit of nuclear cross section; the effective circular area that one particle presents to another as a target for an encounter

(astronomy) the common center of mass around which two or more bodies revolve

(physics) a theory of atomic structure that combined Rutherford's model with the quantum theory; electrons orbiting a nucleus can only be in cer…

(physics) a law expressing the distribution of energy among the molecules of a gas in thermal equilibrium

(physics) statistical law obeyed by a system of particles whose wave function is not changed when two particles are interchanged (the Pauli excl…

(astronomy) an indistinct surface feature of Mars once thought to be a system of channels; they are now believed to be an optical illusion

(astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascen…

(astronomy) the equatorial coordinate specifying the angle, measured eastward along the celestial equator, from the vernal equinox to the inters…

(physics) the center of mass of the immersed part of ship or other floating object

(physics) the center of mass of the immersed part of ship or other floating object

(physics) the center of mass of the immersed part of ship or other floating object

(physics) the center of mass of the immersed part of ship or other floating object

(physics) a dynamical system that is extremely sensitive to its initial conditions

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

(physics) one of the six flavors of quark, the third most massive of all quarks

(physics) relating to or based on concepts that preceded the theories of relativity and quantum mechanics

(physics) the ratio of the applied stress to the change in shape of an elastic body

(physics) of waves having a constant phase relation

(physics) the intermolecular force that holds together the molecules in a solid or liquid

(physics) a brief event in which two or more bodies come together; "the collision of the particles resulted in an exchange of energy and a chang…

(physics) the characteristic of quarks that determines their role in the strong interaction; "each flavor of quarks comes in three colors"

(physics) the interaction that binds protons and neutrons together in the nuclei of atoms; mediated by gluons

(physics) the characteristic of quarks that determines their role in the strong interaction; "each flavor of quarks comes in three colors"

(astronomy) the luminous cloud of particles surrounding the frozen nucleus of a comet; forms as the comet approaches the sun and is warmed

(astronomy) a relatively small extraterrestrial body consisting of a frozen mass that travels around the sun in a highly elliptical orbit

(astronomy) apparent meeting or passing of two or more celestial bodies in the same degree of the zodiac

(physics) the maintenance of a certain quantities unchanged during chemical reactions or physical transformations

(physics) parity is conserved in a universe in which the laws of physics are the same in a right-handed system of coordinates as in a left-hande…

(physics) the universal constant relating force to mass and distance in Newton's law of gravitation

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

(astronomy) Copernicus' astronomical model in which the Earth rotates around the sun

(physics) an effect whereby a body moving in a rotating frame of reference experiences the Coriolis force acting perpendicular to the direction…

(physics) a force due to the earth's rotation; acts on a body in motion (airplane or projectile) in a rotating reference frame; in a rotating fr…

(physics) the theory that light is transmitted as a stream of particles

(physics) the theory that light is transmitted as a stream of particles

(physics) something joined by two equal and opposite forces that act along parallel lines

(physics) the probability that a particular interaction (as capture or ionization) will take place between particles; measured in barns

(astronomy) a heavenly body's highest celestial point above an observer's horizon

a flow of electricity through a conductor; "the current was measured in amperes"

(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded

(astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascen…

(physics) a rate of decrease in velocity

(astronomy) the angular distance of a celestial body north or to the south of the celestial equator; expressed in degrees; used with right ascen…

(physics) the process in which there is movement of a substance from an area of high concentration of that substance to an area of lower concent…

(physics) the angle that a magnetic needle makes with the plane of the horizon

(physics) the property of matter and electromagnetic radiation that is characterized by the fact that some properties can be explained best by w…

(physics) a phase space together with a transformation of that space

(astronomy) the reappearance of a celestial body after an eclipse

(physics) the theory that space and time are relative concepts rather than absolute concepts

(physics) the ratio of the applied stress to the change in shape of an elastic body

a flow of electricity through a conductor; "the current was measured in amperes"

(physics) the potential energy of an electric charge in an electric field, or of an electric current in a magnetic field.

(physics) a particle that is less complex than an atom; regarded as constituents of all matter

(astronomy) the reappearance of a celestial body after an eclipse

(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; "energy c…

(astronomy) a measure of time defined by Earth's orbital motion; terrestrial time is mean solar time corrected for the irregularities of the Ear…

(astronomy) an arbitrarily fixed date that is the point in time relative to which information (as coordinates of a celestial body) is recorded

(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic

(astronomy) either of the two celestial points at which the celestial equator intersects the ecliptic

(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust; "‘extragalactic nebula’ is…

(physics) law obeyed by a systems of particles whose wave function changes when two particles are interchanged (the Pauli exclusion principle ap…

(physics) a theory that explains a physical phenomenon in terms of a field and the manner in which it interacts with matter or with other fields

(physics) the six kinds of quarks

(physics) the six kinds of quarks

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

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

(physics) the influence that produces a change in a physical quantity; "force equals mass times acceleration"

(physics) a thermodynamic quantity equivalent to the capacity of a physical system to do work; the units of energy are joules or ergs; "energy c…

(physics) the transfer of energy between elementary particles or between an elementary particle and a field or between fields; mediated by gauge…

(physics) a particle that is less complex than an atom; regarded as constituents of all matter

(astronomy) a collection of star systems; any of the billions of systems each having many stars and nebulae and dust; "‘extragalactic nebula’ is…

(physics) the universal constant in the gas equation: pressure times volume = R times temperature; equal to 8.3143 joules per kelvin per mole

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

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

(physics) the universal constant relating force to mass and distance in Newton's law of gravitation

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

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

(physics) the theory that any two particles of matter attract one another with a force directly proportional to the product of their masses and…

(physics) a wave that is hypothesized to propagate gravity and to travel at the speed of light

(physics) the force of attraction between all masses in the universe; especially the attraction of the earth's mass for bodies near its surface;…

(physics) a wave that is hypothesized to propagate gravity and to travel at the speed of light

(physics) the lowest energy state of an atom or other particle

(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascensio…

(physics) a brief event in which two or more bodies come together; "the collision of the particles resulted in an exchange of energy and a chang…

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

(physics) the principle that (within the elastic limit) the stress applied to a solid is proportional to the strain produced

(astronomy) the angular distance of a celestial point measured westward along the celestial equator from the zenith crossing; the right ascensio…

(astronomy) the generalization that the speed of recession of distant galaxies (the red shift) is proportional to their distance from the observ…

(astronomy) the generalization that the speed of recession of distant galaxies (the red shift) is proportional to their distance from the observ…

(astronomy) the disappearance of a celestial body prior to an eclipse

(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees

(physics) the angle that a magnetic needle makes with the plane of the horizon

(astronomy) the angle between the plane of the orbit and the plane of the ecliptic stated in degrees

(physics) of waves having no stable definite or stable phase relation

(physics) the tendency of a body to maintain its state of rest or uniform motion unless acted upon by an external force