北京新航道学校bj.xhd.cnSAT2物理考试常用术语大全HYPERLINK"http://beijing.newchannel.org/"北京新航道为考生指导HYPERLINK"http://beijing.newchannel.org/"SAT考试并且为需要的学子提供SAT培训。SAT备考尤其重要，下面我们为考生整理了一些关于SAT2物理常用术语，希望帮助考生备考SAT提供一些帮助和借鉴。Thefollowinglistdefinesallofthebold-facedwordsyouencounteredasyoureadthisbook.AAbsolutezeroThelowesttheoreticaltemperatureamaterialcanhave,wherethemoleculesthatmakeupthematerialhavenokineticenergy.Absolutezeroisreachedat0Kor–273oC.AccelerationAvectorquantitydefinedastherateofchangeofthevelocityvectorwithtime.ActivityInradioactivesubstances,thenumberofnucleithatdecaypersecond.Activity,A,willbelargerinlargesamplesofradioactivematerial,sincetherewillbemorenuclei.AlphadecayAformofradioactivedecaywhereaheavyelementemitsanalphaparticleandsomeenergy,thustransformingintoalighter,morestable,element.AlphaparticleAparticle,whichconsistsoftwoprotonsandtwoneutrons.Itisidenticaltothenucleusofaheliumatomandisejectedbyheavyparticlesundergoingalphadecay.AmplitudeInreferencetooscillation,amplitudeisthemaximumdisplacementoftheoscillatorfromitsequilibriumposition.Amplitudetellshowfaranoscillatorisswingingbackandforth.Inperiodicmotion,amplitudeisthemaximumdisplacementineachcycleofasysteminperiodicmotion.Theprecisedefinitionofamplitudedependsontheparticularsituation:inthecaseofastretchedstringitwouldbemeasuredinmeters,whereasforsoundwavesitwouldbemeasuredinunitsofpressure.AngleofincidenceWhenalightraystrikesasurface,theangleofincidenceistheanglebetweentheincidentrayandthenormal.AngleofreflectionTheanglebetweenareflectedrayandthenormal.AngleofrefractionTheanglebetweenarefractedrayandthelinenormaltothesurface.Thefollowinglistdefinesallofthebold-facedwordsyouencounteredasyoureadthisbook.AngularaccelerationAvectorquantity,,equaltotherateofchangeoftheangularvelocityvectorwithtime.Itistypicallygiveninunitsofrad/s2.AngulardisplacementThenetchange,,inapoint’sangularposition,.Itisascalarquantity.AngularfrequencyAfrequency,f,definedasthe