4【物理】9月邕衡金卷联考物理参考答案
1邕衡金卷·名校联盟南宁三中、柳州高中2024届第一次适应性考试物理参考答案1.B2.C3.D4.B5.D6.D7.B8.B9.CD10.BC11.AC12.BD13.(1)C(1分)(2)(1分)(3)0.41(2分)3.14(2分)14.(1)×1(1分)(2)1445Ω(2分)(3)300Ω(2分)(4)1Ω9Ω90Ω(第4问每空1分)15.【详解】(1)光线在M点发生折射,光路如图所示由几何关系得β=53°(1分)由折射定律得(2分)代入数值可得n=43(1分)(2)在N点全反射,则有(2分)PNQ的光程为(1分)光在介质中的传播速度为速度v=cn(2分)得v=3c4解得t=sv=nL...
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