湖北省荆门市2019届高三物理元月调研考试试卷(扫描版).doc

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1、 1 -湖北省荆门市 2019 届高三物理元月调研考试试卷(扫描版)- 2 - 3 - 4 - 5 - 6 - 7 -荆门市 2019 年高三年级元月调考理科综合参考答案物理部分14.C 15.D 16.D 17.D 18.A 19.AB 20.AC 21.AD22.(5 分) (1)1.02cm (2 分) (2) (3 分) 2)(tdgl23 (10 分) (1)A E (2+1=3 分) (2)A C (3 分)(3)2.20(2.102.30) 0.500(0.4000.600) (1+1+2=4 分)24. (15 分) 解:(1) (4 分)小球到 A 点的速度如图所示,由图可

2、知smvx /260cos4s0 (2) (5 分) Ay 3ini 由平抛运动规律得: ghvy2 t vx0 解得: mh6. 23.695m- 8 -(3) (6 分)取 A 点为重力势能的零点,由机械能守恒定律得: )cos(21RmgvC代入数据得: smvC/7 由圆周运动向心力公式得: gNC2代入数据得: C8由牛顿第三定律得:小球对轨道的压力大小 NC8/,方向竖直向上25. (17 分) 解:(1) (6 分)设物块获得的初速度为 ,有:I=m 0设物块与小车组成的系统相对静止时的共同速度为 v,由动量守恒定律应有: =(m+M)v根据能量守恒定律应有: = 联立可得: =

3、20J;(2) (6 分)物块上升到最大高度时竖直速度为 0,物块与小车具有相同的水平速度 ,在水平方向根据动量守恒定律应有:m =(m+M) 物块从 A 到上升到最高度过程,对物块与小车组成的系统由能量守恒定律应有:m = +mgh 根据题意, = 联立解得:h=0.5m;(3) (5 分)根据能的转化和守恒定律有:Q=f = ;联立解得: =2.5m;33.(1) (6 分)ABE (选对一个给 3 分,选对两个给 4 分,选对 3 个给 6 分,每选错一个扣3 分,最低得分为 0 分)(2) (9 分)(5 分)B 中气体做等容变化,由查理定律: BPT- 9 -解得: 3091BPTK

4、A 中气体做等压变化,由于隔板导热,A、B 中气体温度相等,由盖吕萨克得:,即VT.309H解得: .(4 分)当 A 中气体压强为 1.5p0,活塞将顶在卡环处,对 A 中气体: ,APVT即 1.503 15.HK由于薄板导热性能良好,故 B 中气体的温度为 1500K34.(1) (6 分)ADE(选对一个给 3 分,选对两个给 4 分,选对 3 个给 6 分,每选错一个扣 3 分,最低得分为 0 分)(2)(5+4=9 分)解:质点 P 第一次到达波峰所需的时间,就是初始时刻 x =0.06m 处的质点的振动状态传到 P 点所需的时间由波的图像知: x =0.96 -0.06 =0.9m 所以经过时间为: t =x/v =0.9/0.6 s =1.5s 由波的图像知,振幅 A =0.05m,波长 =0.24m 所以波上质点的振动周期 T = / v =0.4s 由波的图像知,从 P 点起振到第一次到达波峰历时为: t = 43T 所以 P 通过的路程为: S =3 A =35cm=15cm

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