[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fDbXge_zBS1x7OJwgrkKUre3iibsnWGC5B48Pwl7JT14":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":19,"related":20,"source":30,"type":31},[],"2023-05-17 10:29:33",14225628,[8,9,10,11],"8.25m","9.25m","10.25m","11.25m",{"count":13,"courseId":14,"courseImg":15,"courseName":16,"workId":17,"workName":18},21,"d666eda9b10351452961f16016433858","https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc4dbade751403f19ce5fe4056a50a610.jpg","大学物理I(1)","58aa14fef8364a8e82389af38d44a2c0","\"狭义相对论时空观\"知识点过关测试","在实验室中测得两个粒子均以0.75c的速度沿同一方向飞行,它们先后击中同一静止靶子的时间间隔为5×10-8s.则击中靶子的前两个粒子间的距离是( )",[21,32,41,50,59,68,77,86,89,98],{"answer":22,"createTime":5,"id":23,"options":24,"question":29,"source":30,"type":31},[],14225621,[25,26,27,28],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F92fe37fbfda05071beb88a735d4a4957.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F79d4e65a1b546725177dba98bae6f038.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F016c7ffc45ef6a1a4c32912f7410e3d6.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F16fe8fc8058a5b988cc107ce55966546.webp\">","宇宙飞船相对于地面以速度v作匀速直线飞行,某一时刻飞船头部的宇航员向飞船尾部发出一个光讯号,经过\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F5dbf7796d7b456702b571fb19e415d3c.webp\">(飞船上的钟)时间后,被尾部的接收器收到,则由此可知飞船的固有长度为(c表示真空中光速) ( )","v1",0,{"answer":33,"createTime":5,"id":34,"options":35,"question":40,"source":30,"type":31},[],14225622,[36,37,38,39],"0.8c","0.6c","0.4c","0.2c","在某地发生两件事,静止位于该地的甲测得时间间隔为4 s,若相对于甲作匀 速直线运动的乙测得时间间隔为5 s,则乙相对于甲的运动速度是(c表示真空中光速) ( )",{"answer":42,"createTime":5,"id":43,"options":44,"question":49,"source":30,"type":31},[],14225623,[45,46,47,48],"2s","2.38s","4.37s","6.17s","飞船A以0.8c的速度相对地球向正东飞行,飞船B以0.6c的速度相对地球向正 西方向飞行.当两飞船即将相遇时A飞船在自己的天窗处相隔2s发射两颗信号弹.在B飞船的观测者测得两颗信号弹相隔的时间间隔为( )",{"answer":51,"createTime":5,"id":52,"options":53,"question":58,"source":30,"type":31},[],14225624,[54,55,56,57],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Ff3da07d1635d843f9801cbfcd90c3bf3.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fd3303946a7450052733bc7fc2b85b8fa.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F6694eff4ec72d614bc344b6227e4305b.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7613842e5badf9b2739612d761684711.webp\">","K系与K'系是坐标轴相互平行的两个惯性系,K'系相对于K系沿Ox轴正方向匀速运动.一根刚性尺静止在K'系中,与O'x'轴成 30°角.今在K系中观测得该尺与Ox轴成 45°角,则K'系相对于K系的速度是( )",{"answer":60,"createTime":5,"id":61,"options":62,"question":67,"source":30,"type":31},[],14225625,[63,64,65,66],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7875e6b1b6e3e22387738ad0f0fa68b1.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F59704b9929b2acbfdb7f9eb9b638557b.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F078e6af2d36cd8555806e34829fc0b59.jpg\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F2b77fabb9dc6135e47affad59cb45fdc.jpg\">","一匀质矩形薄板,在它静止时测得其长为a,宽为b,质量为m0.由此可算出其面积密度为m0\u002Fab.假定该薄板沿长度方向以接近光速的速度v作匀速直线运动,此时再测算该矩形薄板的面积密度则为( )",{"answer":69,"createTime":5,"id":70,"options":71,"question":76,"source":30,"type":31},[],14225626,[72,73,74,75],"4us","6us","8us","10us","一辆高速车以0.8c的速率运动.地上有一系列的同步钟,当经过地面上的一台钟时,驾驶员注意到它的指针在t=0,他即刻把自己的钟拨到t'=0.行驶了一段距离后,他自己的钟指到6 us时,驾驶员看地面上另一台钟的读数是( )",{"answer":78,"createTime":5,"id":79,"options":80,"question":85,"source":30,"type":31},[],14225627,[81,82,83,84],"(1)56.4m(2)56.4m(3)7.96m","(1)56.4m(2)7.96m(3)7.96m","(1)56.4m(2)7.96m(3)56.4m","(1)7.96m(2)56.4m(3)7.96m","一飞船以0.99c的速率平行于地面飞行,宇航员测得此飞船的长度为400 m.则:(1)地面上的观察者测得飞船长度是多少?(2)为了测得飞船的长度,地面上需要有两位观察者携带着两只同步钟同时站在飞船首尾两端处.那么这两位观察者相距多远?(3)宇航员测得两位观察者相距多远",{"answer":87,"createTime":5,"id":6,"options":88,"question":19,"source":30,"type":31},[],[8,9,10,11],{"answer":90,"createTime":5,"id":91,"options":92,"question":97,"source":30,"type":31},[],14225629,[93,94,95,96],"0.668s","0.686s","0.866s","0.886s","在参考系S中,一粒子沿x轴做直线运动,从坐标原点O运动到x=1.50×108m处,经历时间Δt=1 s.则粒子运动所经历的原时是( )",{"answer":99,"createTime":5,"id":100,"options":101,"question":106,"source":30,"type":31},[],14225630,[102,103,104,105],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F76d7c8048fe1a9ad6cb9b12e0567f88f.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F7b3d602c0b7594f5432fe80c8b3901b5.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fc8660bc818e7c91358bf9d5cb26623b7.webp\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0f854b260d8ced336c8757bbfb41ef30.webp\">","一个在实验室中以0.8c的速度运动的粒子飞行了3m后衰变.则实验室中的观察者测量该粒子存在了( )s"]