当前位置 :
【风筝的飞行隐藏着什么科学原理?英文的!如上最好有中英对照的】
1人问答
更新时间:2024-04-20 09:43:34
问题描述:

风筝的飞行隐藏着什么科学原理?英文的!

如上

最好有中英对照的

陈邦兴回答:
  Kite(device),wind-supportedflyingdeviceconsistingofawoodenorsimilarframeworkcoveredwithpaper,cloth,orsyntheticmaterial.Akiteisarudimentaryairfoil;itcanbeflownforpleasureorforpurposesofstudy.Attachedtoalongstring,itcanbesentaloftthroughtheactionofthewindonitssurfaces.Itsdistanceorheightiscontrolledfromthegroundbyplayingoutthestring.KitesareofancientoriginandwereflownbyvariousAsianpeoplesandtheancientEgyptians.Todaykiteflyingisapopularpastimeandacompetitivesport.IneasternAsia,specialcompetitionsareheldinwhichthekitesareelaboratelydesignedanddecoratedintheformsofbirds,fish,ordragonsandmaybeequippedwithwhistlesorpipesthatemitmusicalsoundsasthewindblowsthroughthem.Kite-fightingcontestsarealsoheld,inwhichcompetitorsattempttousetheirkitestoattackanddownthekitesofopponents.   Kiteshavebeenemployedforpracticalpurposesaswellasforpleasure.AmericandiplomatandscientistBenjaminFranklinexperimentedwithkitestoinvestigateatmosphericelectricity,andkitestudieswerealsomadebytheAmericanphysicistandinventorAlexanderGrahamBell.Beginninginthe1890sandcontinuingforabout40years,boxkites,consistingoftwoormoreconnectedopen-endedboxes,wereusedforsendingmeteorologicinstrumentsalofttomeasurewindvelocity,temperature,barometricpressure,andhumidity.Inthelate19thandearly20thcenturies,kiteswereusedforliftingmilitaryobserverstoheightsfromwhichtheycouldobservethedispositionofenemyforces.DuringWorldWarII(1939-1945),kiteswerealsousedasgunnerytargets.Present-dayapplicationsincludetheiruseassignalsinair-sea-rescueoperations.
科学推荐
科学推荐
最新更新
优秀科学推荐
热门科学
PC端 | 移动端 | mip端
问答网(wenda2.com)汇总了汉语字典,新华字典,成语字典,组词,词语,在线查字典,中文字典,英汉字典,在线字典,康熙字典等等,是学生查询学习资料的好帮手,是老师教学的好助手。
声明:本网站尊重并保护知识产权,根据《信息网络传播权保护条例》,如果我们转载的作品侵犯了您的权利,请在一个月内通知我们,我们会及时删除。

邮箱:联系方式:

Copyright©2009-2021 问答网 wenda2.com 版权所有 闽ICP备2022000227号-1