2001香港高二物理统考.doc

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1、HONGKONGEXAMINATIONSAUTHORITYHONGKONGCERTIFICATEOFEDUCATIONEXAMINATION2001PHYSICSPAPERI8.30am-10.00am(1hours)ThispapermustbeansweredinEnglish1.AnswerALLquestionsinSectionAandanyFOURquestionsinSectionB.2.Writeyouranswersintheanswerbookprovided.ForSectionA,thereisnoneedtostarteachquestiononaf

2、reshpage.3.Somequestionscontainpartsmarkedwithanasterisk(*).Inansweringtheseparts,candidatesarerequiredtogiveparagraph-lengthanswers.Ineachoftheseparts,onemarkisallocatedtoassesscandidates'abilityineffectivecommunication.4.Takeg=10ms-2.5.Unlessotherwisespecified,allthecellsareassumedtohaven

3、egligibleinternalresistance.6.Thelastpageofthisquestionpapercontainsalistofphysicsformulaewhichyoumayfinduseful.2001-CE-PHYI-15-15-SectionA(30marks)AnswerALLquestionsinthissection.(2001-CE-PHYI-1)1.Figure1Alumpofplasticineofmass0.2kgishangingfreelyinairfromastring(seeFigure1).Abulletofmass0

4、.01kgisfiredfromanairgun.Ithitstheplasticineandbecomesembeddedinit.Theplasticinethenswingstoamaximumheightof0.06maboveitsinitialposition.(a)Findthespeedoftheplasticineimmediatelyafterthebulletisembeddedinit.(2marks)(b)HongKongOrdinancestatesthatthekineticenergyofbulletsfiredfromairgunsshoul

5、dnotexceed2J.Byconsideringthespeedofthebulletbeforeithitstheplasticine,explainwhytheabovegunviolatestheOrdinance.(3marks)(2001-CE-PHYI-2)2.Ametalcancontainingcompressedgasat200kPaand30℃isplacedunderdirectsunlightforsometime.(a)Ifthetemperatureofthegasrisesto60℃,findthegaspressureinsidetheca

6、n.Assumethatthevolumeofthecanremainsunchanged.(2marks)(b)Basedonthekinetictheory,explainwhythegaspressureinsidethecanincreaseswithtemperatureataconstantvolume.(3marks)2001-CE-PHYI-15-15-(2001-CE-PHYI-3)3.Figure2AstudentholdsalensaboveapictureandtheimageobservedisshowninFigure2.(a)Whatkindof

7、lensisusedbythestudent?Explainyouranswer.(2marks)(b)SketcharaydiagramtoshowhowtheimageinFigure2isformed.(3marks)2001-CE-PHYI-15-15-(2001-CE-PHYI-4)4.Figure3AdipperS1isconnectedtoavibratorandproducescircularwaterwavesinarippletank.AcorkisplacedatapointPon