大庆市2025届高三年级第一次教学质量检测 物理答案

大庆市2025届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