satellites课件
日期：2010-02-17 02:56
Howdoesasatelliteproduceelectricity?5，Satellites永春六中英语组张少清MADEBYZHANGSHAOQINGWhatwascarriedupintospaceonOct15th，Whydon’tmostbroadcastingsatelliteschangetheirpositions?Whatisasatellite?Asatelliteisanobject，Howareman-madesatellitescarriedintospace?3，Whyaresatellitessoexpensive?4，440km/hbecausetheycanescapethepulloftheearth2Whyaresatellitessoexpensive?Becauseithastobelightandithasexpensiveequipment:cameras，Whatisasatellite?2，whichtravelsinanorbitroundanotherobjectinspace1Howareman-madesatellitescarriedintospace?Theyarecarriedupintospacebyrocketandtherocketsmustreachaspeedof28，2003?ShenZhouⅤQuestions:1，eithernaturalorman-made，etc3Howdoesasatelliteproduceelectricity?Asatelliteproduceselectricitybyusingverybroadsunpanels4Whatcansatellitessendbacktotheearth?RadioandTVprogrammes;signals;informationandphotosofweatherconditions5Whydon’tmostbroadcastingsatelliteschangetheirpositions?Becauseonlyinthisway，Whatcansatellitessendbacktotheearth?6,
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