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Physics Terms Flashcards

Physics Terms, CIE IGCSE

Terms : Hide Images
677025459a.c. generatora device, such as a dynamo, used to generate alternating current (a.c.)
677025460acceleration(physics) a rate of change of an object's velocity
677025461acceleration due to gravitythe acceleration of an object falling freely under gravity
677025462acceleration of free fallthe acceleration of an object falling freely under gravity
677025463activity (nuclear)the rate at which nuclei decay in a sample of a radioactive substance
677025464air resistancethe friction force on an object moving through the air
677025465Alpha decaythe decay of a radioactive nucleus by the emission of an alpha particle
677025466alpha particlea particle of two protons and two neutrons emitted by an atomic nucleus during radioactive decay
677025467alternating current (a.c.)electric current that flows first one way and then the other in a circuit
677025468ammetera meter for measuring electric current
677025469amp, ampere (A)the SI unit of electric current
677025470amplitudethe greatest height of a wave above its undisturbed level
677025471angle of incidencethe angle between an incident ray and the normal to the surface at the point where it meets a surface
677025472angle of reflectionthe angle between a reflected ray and normal to the at the point where it reflects from a surface
677025473angle of refractionthe angle between a refracted ray and the normal to the surface at the point where it passes from material to another
677025474average speedspeed calculated from total distance travelled divided by total time taken
677025475axisthe line passing through the centre of a lens, perpendicular to the surface
677025476background radiationthe radiation from the environment to which we are exposed all the time
677025477barometeran instrument used to measure atmospheric pressure
677025478batterytwo or more electrical cells connected together in series (the word may also be used to mean a single cell)
677025479becquerel (Bq)the SI unit of activity per second
6770254801 Bq1 decay per second
677025481beta decaythe decay of a radioactive nucleus by emission of a beta particle
677025482beta particlea particle (an electron) emitted by an atomic nucleus during radioactive decay
677025483biomass fuela material, recently living, used as a fuel
677025484boiling pointthe temperature at which a liquid changes to a gas (at constant pressure)
677025485Boyle's lawthe law that relates the pressure and volume of a fixed mass of gas
677025486Boyle's law equationpV = constant at constant temperature
677025487Brownian motion...

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