[{"data":1,"prerenderedAt":-1},["ShallowReactive",2],{"$fgs5yhRY4RCRIp8-iQhStcCBs9_OWKCycgo05eLLKjs0":3},{"answer":4,"createTime":5,"id":6,"options":7,"origin":12,"question":15,"related":16,"source":27,"type":28},[],"2024-06-21 10:23:18",995608036,[8,9,10,11],"5.16×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbd874fd745c7272abb321d3dc5934a22.png\">m","5.26×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F22b4ca2c582a782e103b1fdbd5ca0ebc.png\">m","4.34×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4d23686a418471af1ab259dd118e5f5d.png\">m","5.34×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbc1e9990b527d32a817231b900a4b1cb.png\">m",{"courseImg":13,"courseName":14},"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa48b9ec47e762bc8aabd17b73bce9159.png","[公开课]大学物理A1","哈雷彗星绕太阳运动的轨道是一个椭圆.它离太阳最近距离为r1=8.75×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F155d2586c62a5d62895fc29538b3a004.png\">m 时的速率是v1=5.46×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F0f203deab61fb8bffbaa42d843f478ed.png\">m\u002Fs,它离太阳最远时的速率是v2=9.08×\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fbdec5b44d7f6fa844f7f7296af18bd80.png\">m\u002Fs,这时它离太阳的距离r2是(太阳位于椭圆的一个焦点)( )",[17,29,38,47,55,60,65,73,76,85],{"answer":18,"createTime":19,"id":20,"options":21,"question":26,"source":27,"type":28},[],"2024-06-21 10:23:17",995606685,[22,23,24,25],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F788dbade42555da153bc91666295d9c8.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F4c0350186d0b8b1e217d12daa5bff3da.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F876df37e9314b3a25f300b6b2babe2a5.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F11f8ae78c8c3fbec4ebcff861c9fc80b.png\">","面积为S的空气平行板电容器,极板上分别带电量±q,若不考虑边缘效应,则两极板间的相互作用力为:( )","v2",0,{"answer":30,"createTime":5,"id":31,"options":32,"question":37,"source":27,"type":28},[],995606706,[33,34,35,36],"\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F14536c52daed11530426ca2a7f498b9d.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fa360febc5630a48aaf5b34d31c701ba5.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F87fbebba33d1979a0a56618b606a2bb4.png\">","\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F35193be71bb9759cdbe14bb091abf399.png\">","如图所示圆锥摆,绳长为l,绳子一端固定在O点,另一端系一质量为m的质点,以匀角速度绕竖直轴作圆周运动,绳子与轴线的夹角为θ,那么质点相对于O点的角动量的大小为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F290bf5370e82d6c363b4895f883f836f.png\">",{"answer":39,"createTime":5,"id":40,"options":41,"question":46,"source":27,"type":28},[],995607065,[42,43,44,45],"L上各点的B一定为零","圆电流在L上各点的磁感应强度矢量和一定为零","B沿L上任一点的切向分量为零","安培环路定律对圆电流的磁场不适用","如图在一圆形电流旁取一个圆形闭合回路L,且L与圆形电流同轴,由安培环路定律\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fee65fd634688a28a958781bf1ef5e6ba.png\">,则可得:( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F469ab8188ff75792897075a396ff4a91.png\">",{"answer":48,"createTime":5,"id":49,"options":50,"question":53,"source":27,"type":54},[],995607196,[51,52],"对","错","质点运动的速率等于速度的大小.( )",3,{"answer":56,"createTime":5,"id":57,"options":58,"question":59,"source":27,"type":54},[],995607290,[51,52],"静电场是一种特殊的物质,与实物的主要区别是:实物具有质量、动量和能量,而静电场是没有的.( )",{"answer":61,"createTime":5,"id":62,"options":63,"question":64,"source":27,"type":54},[],995607394,[51,52],"位移是位置矢量的增量.( )",{"answer":66,"createTime":5,"id":67,"options":68,"question":72,"source":27,"type":28},[],995607696,[69,70,71],"A正确","B正确","都不正确","两块平行放置的金属板A和B相互靠近,面积均为S,A板带电为+Q,B板原来不带电,忽略边缘效应,有两名同学分别画出静电平衡时,两板上的电荷分布,如图所示,请你判断这两位同学画的是否正确( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F10a67e18748f64ab92c3f375e6f4867f.png\">\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002F93f219dc214f7ccf5c79b95522b48f2e.png\">",{"answer":74,"createTime":5,"id":6,"options":75,"question":15,"source":27,"type":28},[],[8,9,10,11],{"answer":77,"createTime":5,"id":78,"options":79,"question":84,"source":27,"type":28},[],995608434,[80,81,82,83],"最概然速率是气体分子中大部分分子所具有的速率","最概然速率是速率最大的速度值","速率大小与最概然速率相近的气体分子的比率最大","最概然速率是麦克斯韦速率分布函数的最大值","关于麦克斯韦速率分布中最概然速率的概念,下面正确的表述是( )",{"answer":86,"createTime":5,"id":87,"options":88,"question":93,"source":27,"type":28},[],995608666,[89,90,91,92],"μ≥1\u002F2","B.μ≥1\u002F","μ≥2","D.μ≥","如图所示,用一斜向上的力F(与水平成30°角),将一重为G的木块压靠在竖直壁面上,如果不论用怎样大的力F,都不能使木块向上滑动,则说明木块与壁面间的静摩擦系数μ的大小为( )\u003Cimg src=\"https:\u002F\u002Ftihai-oss-cloud.itihey.com\u002Fimg\u002Fb8c08c429267a5c19f50524e77e43ecb.png\">"]