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1、CandidatenameINTERNATIONALGENERALCERTIFICATEOFSECONDARYEDUCATIONSampleExaminationPaperAPHYSICSPaper21hour15minutesCandidatesanswerontheQuestionPaper.NoAdditionalMaterialsarerequired.READTHESEINSTRUCTIONSFIRSTWriteyournameonallworkyouhandin.Writeindarkblueorblac
2、kpen.Youmayuseapencilforanydiagrams,graphsorroughworking.Donotusestaples,paperclips,highlighters,glueorcorrectionfluid.Answerallquestions.Attheendoftheexamination,fastenallyourworksecurelytogether.Thenumberofmarksisgiveninbrackets[]attheendofeachquestionorpartq
3、uestion.ThequestionsinthissampleexaminationpaperweretakenfromIGCSEPhysicsPaper2andarereproducedbypermissionoftheUniversityofCambridgeLocalExaminationsSyndicate:Questions1,9,11,12and19May/June2007Questions2,3and4May/June2005Questions5,6and7May/June2006Question8O
4、ctober/November2007TheUniversityofCambridgeLocalExaminationsSyndicatebearsnoresponsibilityfortheexampleanswerstoquestionstakenfromitspastquestionpaperswhicharecontainedinthispublication.21Themechanicalstop-clockshowninFig.1.1hasForExaminer’sasecondshand,whichro
5、tatesonceeveryminuteUseandaminuteshand,whichrotatesonceeveryhour.startresetstop605555010minuteshand4515secondshand4020352530Fig.1.1(a)Astudentusestheclocktotimetheintervalsbetweentrainstravellingalongtherailwaypasthisschool.Hesetstheclocktozero(bothhandsvertica
6、l).Astrain1passes,hestartstheclockandleavesitrunning.After35s,train2passes.OntheblankfaceofFig.1.2,showthepositionsofthetwohandsoftheclockastrain2passes.Makesureitisclearwhichhandiswhich.[2]60555501045154020352530Fig.1.2©UCLES20070625/02/M/J/073(b)Train3passest
7、heschool4minutesand55saftertheclockwasstarted.ForExaminer’sOntheblankfaceofFig.1.3,showthepositionsofthehandsoftheclockastrain3Usepasses.[2]60555501045154020352530Fig.1.3(c)Calculatethetimeintervalbetweentrain2andtrain3.timeinterval=...............min..........
8、.....s[1][Total:5]©UCLES20070625/02/M/J/07[Turnover2ForExaminer'sUse1(a)Ameasuringcylindercontains100cm3ofwater.20cm3ofthewaterispouredintoabeaker.OnFig.1.1,markthelevelofth
