高一unit16课件
日期:2010-09-24 09:12
Americanstatesman,inventor,writer,andscientist(1706-1790)BenjaminFranklinwroteanewspaperBenjaminFranklininventedawoodstoveBenjaminFranklinprovedthatlightningwasaformofelectricitybyperforminghisfamousexperimentwithakiteandakeyBenjaminFranklinhelpedAmericawinTheRevolutionaryWar1Before1752scientistsalreadyknewwhatelectricityis2Franklinwashelpedbyafriendtodotheexperiment3Franklinmadethekiteofsilkbecausewetsilkdoesnotconductelectricity4Acondenserwasusedintheexperimenttostoreelectricity5ThekeytiedtothestringwasputintothedoortostopthekiteflyingawayFFFTFKiteExperimentToshowthatlightningandelectricityarethesameInJune1752Thestringwasgettingcharged,“I”collectandstoreagreatdealofelectricityinthecondenserSkimming:ReadthepassagefasttofindouttherightpictureaboutFranklin’sexperimentThemainideaofeachpartPart1(Para1-2):Franklindidtheexperimentinorderto____________________________________________________________Part2(Para3):Istheexperimentsuccessfulornot?prove,
查看全部