大庆市2025届高三年级第一次教学质量检测 物理答案

2024-09-09 · U1 上传 · 2页 · 211.2 K

大庆市2025高三年级第一次教学质量检测物理试题答案及评分标准1.A2.B3.D4.C5.A6.C7.D8.AD9.AB10.BCD11.(6分)(每空2分)(1)B(2)a(3)小于12.(8分)((1)(2)每空1分,其余每空2分)()()不需要()()(或)()14.902567m1v1=m1v3+m2v2ughgs∙hs∙h13.(10分)解:(1)对活塞受力分析得:P1S=mg+P0S··················································2分5解得P1=1.2×10Pa根据玻意耳定律得:P0SL0=P1SL····················································2分解得L=5cm·······································································1分(2)图甲和图乙中气缸内空气的温度为T0=t+273K=300K···································1分根据盖-吕萨克定律得:······················································2分解得:T=360K····································································2分14.(13分)解:根据牛顿第二定律,对背包列式:·························································1分hܿh得:(或)·························································1分根据牛顿第h二定律,对滑雪者列式:·························································1分hܿh得:(或)··························································1分h(2)设滑道AB段的长度为x,滑雪者从顶端到B点所用时间为t,背包的加速度为a1,滑雪者的加速度为a2,初速度为v0,则有对背包:···························································1分u对滑雪者:·························································1分u第1页/共2页{#{QQABLYqAggggQIAAABhCUwW4CgKQkAAAAYgOgBAEMAIAAAFABAA=}#}学科网(北京)股份有限公司解得:t=1s············································································1分x=4m············································································1分(3)到达B点时背包和滑雪者的速度大小分别为······························································1分u݉h······························································1分滑雪者拎u起背包过6程݉h中背包和滑雪者动量守恒,两者的共同速度为v,则有mv1Mv2(mM)v·····························································2分解得···································································1分15.(17分)hm݉h解:(1)粒子通过速度选择器时,根据平衡条件,有qvBqE··································2分可得离子速度为·····························································1分()离子经过静电分析器,根据电场力提供向心力分2································2ʹ解得·····································································分1ʹ在磁分析器中,洛伦兹力提供向心力有······································分2ʹ解得·····································································1分ʹ(3)离子在圆形磁场中做匀速圆周运动的周期为·································1分πT离子在圆形磁场中运动时间···············································1分π离子离开圆形磁场到达到硅片阶段做匀速直线运动·····················1分h加上电场后,离子在复合场中做螺旋线运动,平行平面方向不发生变化,垂直平面方向即沿电场方向做匀加速运动:··································································1分E在复合场中沿电场方向位移得······································分1πm离开复合场时沿电场方向速度得·····································1分m离开复合场时沿电场方向做匀速运动,位移为得·······················分1m间距为·····································分MN+1πuummmm第2页/共2页{#{QQABLYqAggggQIAAABhCUwW4CgKQkAAAAYgOgBAEMAIAAAFABAA=}#}学科网(北京)股份有限公司

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