九江市2023-2024学年度八年级下学期期末考试试题卷物理试卷答案试卷答案,炎德英才答案网站目前收集并整理关于九江市2023-2024学年度八年级下学期期末考试试题卷物理试卷答案试卷答案得系列试题及其答案，更多试题答案请关注我们

九江市2023-2024学年度八年级下学期期末考试试题卷物理试卷答案试卷答案

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九江市2023-2024学年度八年级下学期期末考试试题卷物理试卷答案第一部分

4.如图甲所示,在杨氏双缝干涉实验中,S为单色光源,单缝S0到双缝S1、S2的距离相等,O点为双缝连线的中垂线与光屏MN的交点。实验时,利用刻度尺测出单缝S0到光屏的间距为L,利用测量头测得光屏上相邻明条纹的中心间距为△x。,某同学用单色光1,通过沿S1、S2连线的中垂线移动光屏的位置(其他装置的位置不变),测出多组L与△x的值,描绘出△x-L的关系图像1,如图乙所示;该同学换用另一个单色光2,重复上述实验操作,描绘出△x-L的关系图像2。已知两图像与横坐标的截距均为L0,与纵坐标的截距分别为-a1、-a2。,则以下分析正确的是A.单缝到双缝的距离为L0,单色光1与单色光2的波长的比值为a2a1B.单色光1比单色光2更容易发生衍射C.如果单色光2能够使某种金属发生光电效应,则单色光1也必定能够使该金属发生光电效应D.单色光1在水中传播的速度大于单色光2在水中传播的速度

九江市2023-2024学年度八年级下学期期末考试试题卷物理试卷答案第二部分（待更新）

13.(10分)如图所示,开口向左、内壁光滑的汽缸固定放置在水平地面上,横截面积均为S的轻d、2d,质薄板1、2把汽缸内的同种气体分成甲、乙两部分,稳定后甲、乙的长度分别为d、2d,大气分,p0,7.压强为p,在下列变化的过程中,汽缸内气体温度始终保持不变,薄板气密性良好.(1)若用水平外力将板1缓慢地向右推进距离d,求稳定时作用在板1上的水平外力的大小和板2向右移动的距离;(2)若打开乙右侧的阀门,抽走乙中气体的气体时,再次关闭阀门,求稳定时板1向右移动的距离.d2d12甲乙阀门vznt