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高三物理学业水平模拟卷(声光热综合应用)第332套学校班级姓名考号考试时间:120分钟满分:120分注意事项本卷共28题,试题围绕声现象、光现象、热现象及其综合应用设置。全卷满分120分,考试时间120分钟。第1—14题为单项选择题,每题只有一个最佳答案;第15—28题须在题后作答区写出必要的文字说明、公式、单位和结论。作图、计算和实验分析应使用规范物理语言;数据保留按题目要求执行,未说明时最终结果保留两到三位有效数字。请独立完成答题,保持卷面整洁,不得在规定区域外书写与答题无关的内容。选择题作答栏题号1234567答案题号891011121314答案一、单项选择题(本大题共14小题,每小题3分,共42分)1.(3分)某同学用可调频声源在同一间教室中发出不同频率的声音。若空气温度保持不变,当声源频率由500Hz调到1000Hz时,下列说法正确的是A.声音在空气中的传播速度约变为原来的2倍B.声音在空气中的传播速度基本不变,波长约减小为原来的一半C.声音的响度一定变为原来的2倍D.声波由纵波变为横波2.(3分)站在峭壁前的同学拍手后0.30s听到回声,取空气中的声速为340m/s。人到峭壁的距离约为A.17mB.34mC.51mD.102m3.(3分)甲、乙两声源在某点的声强级分别为40dB和20dB。若其他条件相同,则该点甲声源的声强约为乙声源的A.2倍B.10倍C.20倍D.100倍4.(3分)两个同相小扬声器发出频率为500Hz的纯音,空气中声速取340m/s。某点到两个扬声器的路程差为0.34m,则该点最可能出现A.相消减弱B.相长加强C.声速增大D.频率减小5.(3分)一束单色光从空气斜射入水中。关于光在水中的变化,下列判断正确的是A.频率变小,波长变长B.频率变大,传播速度变大C.频率不变,传播速度变小,波长变短D.频率不变,传播速度变大,波长变短6.(3分)焦距为10cm的凸透镜前30cm处放置一支蜡烛,光屏上成清晰像。像距和像的性质最接近的是A.像距30cm,倒立等大实像B.像距15cm,倒立缩小实像C.像距20cm,正立放大虚像D.像距10cm,不能成像7.(3分)光纤通信中,光信号能沿光纤芯层长距离传播,主要利用的是A.光的漫反射B.光的色散C.光的衍射D.从光密介质射向光疏介质时的全反射8.(3分)下列关于温度、内能和热量的说法正确的是A.温度升高,物体分子平均动能增大B.温度高的物体内能一定大C.物体吸收热量,温度一定升高D.热量可以像物体一样被储存在物体内部9.(3分)冬天用金属汤匙搅拌热汤时,手很快感到汤匙柄变热;太阳照到身上会感到暖和。前者和后者主要对应的传热方式分别是A.对流、传导B.辐射、对流C.传导、辐射D.传导、对流10.(3分)一定质量的理想气体封闭在刚性容器中,若气体温度由27℃升高到127℃,则气体压强约变为原来的A.1/4B.3/4C.4/3D.400/30011.(3分)质量相同的甲、乙两种液体分别吸收相同热量后,甲升温较多。若不考虑热损失,则A.甲的比热容较大B.甲的比热容较小C.甲的密度一定较大D.乙的沸点一定较高12.(3分)运动员在皮肤表面喷洒少量易挥发液体后会感到变凉,主要原因是该液体A.蒸发时从皮肤吸收热量B.凝固时向皮肤放出热量C.辐射能力比皮肤弱D.把皮肤的温度直接传给空气13.(3分)关于光和声的共同点,下列说法正确的是A.都必须依靠介质传播B.在同一均匀介质中都可能发生反射和折射C.在真空中的传播速度相同D.频率越大,传播速度一定越大14.(3分)一端封闭、一端开口的细管内形成空气柱共鸣。若管口校正不计,第一次出现共鸣时空气柱长度为17.0cm,则此声波在空气中的波长约为A.17.0cmB.34.0cmC.51.0cmD.68.0cm二、填空与基础题(本大题共6小题,每小题4分,共24分)15.(4分)一艘测量船向海底发出超声脉冲,0.80s后接收到海底反射回来的信号。若海水中的声速取1500m/s,则该处海深为________m。为避免下一次发射与本次回波混淆,相邻两次发射的时间间隔应大于________s。作答:______________________________________________________________说明或计算:________________________________________________________检查:______________________________________________________________16.(4分)某音乐教室内空气温度为20℃,声音在空气中的传播速度可近似取v=331+0.6t(m/s)。频率为500Hz的声音在教室内的波长约为________m;若墙面加装吸声材料,主要是为了减小________现象对听音清晰度的影响。作答:______________________________________________________________说明或计算:________________________________________________________检查:______________________________________________________________17.(4分)身高1.70m的同学站在竖直平面镜前1.20m处,则他在镜中的像高为________m;若他向镜面靠近0.30m,像与人的距离变为________m。作答:______________________________________________________________说明或计算:________________________________________________________检查:______________________________________________________________18.(4分)真空中波长为600nm的单色光进入折射率为1.50的玻璃。该光在玻璃中的传播速度为________m/s,波长为________nm。取真空光速c=3.0×10^8m/s。作答:______________________________________________________________说明或计算:________________________________________________________检查:______________________________________________________________19.(4分)用电热杯给0.50kg的水加热,使水温从20℃升高到50℃。水的比热容取4.2×10^3J/(kg·℃),水吸收的热量为________J;若电热杯实际对水加热功率为630W,则所需时间为________s。作答:______________________________________________________________说明或计算:________________________________________________________检查:______________________________________________________________20.(4分)热气球内空气被加热后,气体温度升高、密度________,在外界空气中受到的浮力与重力差增大而上升;从能量角度看,燃料的化学能主要转化为气体的________能和机械能。作答:______________________________________________________________说明或计算:________________________________________________________检查:______________________________________________________________三、实验与材料分析题(本大题共4小题,共26分)21.(6分)某实验小组用共鸣管测空气中的声速。音叉频率为500Hz,缓慢调节水面高度,记录相邻两次共鸣时空气柱长度,如下表。组别第一次共鸣长度/cm第二次共鸣长度/cm长度差/cm117.051.234.2218.152.033.9316.850.934.1(1)相邻两次共鸣空气柱长度之差约等于声波的________。(2)根据第1组数据,求空气中的声速。(3)若不计管口校正,测得声速通常会偏小还是偏大?请说明理由。解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________22.(6分)在“探究凸透镜成像规律”实验中,某小组使用一只焦距未知的薄凸透镜。调节烛焰、透镜和光屏中心在同一高度后,得到如下数据。实验序号物距u/cm像距v/cm像的特点130.015.0倒立、缩小、实像220.020.0倒立、等大、实像315.030.0倒立、放大、实像(1)由表中数据可判断该透镜焦距约为________cm。(2)若把蜡烛移到12.0cm处,为得到清晰像,光屏应向________移动,像将变________。(3)若用不透明纸遮住透镜上半部分,光屏上像的完整性和亮度会怎样变化?解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________23.(7分)某小组研究冰的熔化过程。取0.20kg碎冰放入烧杯中,用额定功率100W的电加热器均匀加热,并每隔2min记录一次温度。实验数据如下。时间/min024681012温度/℃-6000008(1)2min到10min内冰处于________过程,吸收的热量主要用于增大物质的________。(2)若忽略热损失,估算冰的熔化热。(3)若样品中混有少量水而仍按0.20kg作为冰的质量计算,估算出的熔化热会偏大还是偏小?说明理由。解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________24.(7分)阅读材料,完成问题。某校礼堂后墙回声较强,舞台照明局部刺眼,冬季靠窗座位明显偏冷。改造方案包括:后墙增加多孔吸声板,灯具加磨砂罩,窗户更换为中空玻璃。(1)多孔吸声板主要削弱哪类声现象对听音清晰度的影响?(2)磨砂罩使照明更均匀,主要利用光的________反射;它不会改变光的________。(3)从热传递角度说明中空玻璃改善靠窗体感的原因。(4)再提出一条声、光或热方面的节能或安全建议,并说明依据。解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________四、综合计算与应用题(本大题共4小题,共28分)25.(6分)医用超声探头发出频率为2.5MHz的超声波,超声在人体软组织中的传播速度近似取1540m/s。某次检查中,探头发出一列脉冲后,78μs接收到某界面的回波。求:(1)该超声波在软组织中的波长;(2)该界面距探头的深度。解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________26.(7分)一束细光从空气射入折射率为1.50的玻璃砖,入射角为30°。光在玻璃砖内传播到玻璃—空气界面时,入射角变为45°。取sin30°=0.50。求:(1)光进入玻璃后的折射角;(2)玻璃—空气界面的临界角;(3)该光在第二个界面能否射出玻璃,并说明理由。解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________27.(7分)某家庭使用电热水器加热50kg的水,水温由20℃升高到50℃。水的比热容取4.2×10^3J/(kg·℃),电热水器额定功率为2.0kW,加热效率为84%。求:(1)水吸收的热量;(2)电热水器消耗的电能;(3)理论加热时间。解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________28.(8分)学校礼堂进行声光热综合调试。讲台到后排学生的距离为18m,空气中声速取340m/s;一盏聚光灯通过焦距为0.50m的薄凸透镜把灯丝成像到3.0m外的幕布上;排练时礼堂内空气质量约为1.2×10^3kg,空气比热容取1.0×10^3J/(kg·℃),空调在一段时间内从室内空气移走的热量为3.6×10^6J。求:(1)后排学生听到讲台声源声音约需多长时间;(2)灯丝到凸透镜的距离;(3)室内空气理论降温多少;(4)结合声、光、热提出一条综合优化措施。解答区:________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________________

参考答案与解析一、单项选择题答案题号1234567891011121314答案BCDACBDACDBABD选择题逐题解析第1题:选B。同一温度下,空气中的声速主要由介质性质和温度决定,声源频率改变不会使声速按比例改变。由v=λf可知,声速近似不变时,频率从500Hz变为1000Hz,波长约变为原来的一半。A把频率变化误认为声速变化;C中响度与振幅、距离等有关,题干未给出;D错误,空气中的声波仍为纵波。第2题:选C。回声过程是声音从人传到峭壁再返回人耳,声波通过的总路程为人到峭壁距离的2倍。总路程s=vt=340×0.30=102m,所以人到峭壁的距离为102/2=51m。A、B忽略或误用往返路程,D把往返总路程当成单程距离。第3题:选D。声强级每增加10dB,声强变为原来的10倍;甲比乙高20dB,对应声强比为10^(20/10)=100。A、B、C只按数值差作线性理解,未体现分贝标度的对数关系。第4题:选A。频率500Hz、声速340m/s时,波长λ=v/f=340/500=0.68m。两同相声源到某点的路程差0.34m,正好是λ/2,到达该点时相位相反,发生相消减弱。B适用于路程差为整数倍波长的情况;C、D与干涉判断无关。第5题:选C。单色光从空气进入水中,频率由光源决定,过界面时保持不变;水的折射率大于空气,传播速度减小。由v=λf可知,频率不变而速度变小时波长变短。A、B均错在频率变化;D错在速度变化方向。第6题:选B。凸透镜焦距f=10cm,物距u=30cm。由1/f=1/u+1/v得1/v=1/10-1/30=1/15,故v=15cm。物距大于2f,成倒立、缩小的实像。A是物在2f处的等大像情况;C是物在焦距内成虚像;D不符合成像条件。第7题:选D。光纤芯层折射率较大,包层折射率较小,光从芯层射向包层且入射角大于临界角时,会发生全反射,使光沿光纤传播。漫反射、色散、衍射都不是光纤长距离传输的主要机制。第8题:选A。温度是分子热运动平均动能的标志,温度升高,分子平均动能增大。内能还与质量、物态和物质种类有关,所以温度高不一定内能大;吸热可用于熔化、汽化等状态变化,温度不一定升高;热量是能量转移过程量,不能说被物体“储存”。第9题:选C。金属汤匙柄变热是热量沿金属内部传递,属于热传导;太阳照到身上变暖主要靠电磁辐射传递能量,不需要介质。A、B、D混淆了传导、对流和辐射的条件。第10题:选D。刚性容器体积不变,一定质量理想气体满足p/T=常量,温度必须换算为热力学温度。27℃=300K,127℃=400K,所以压强变为原来的400/300倍。C数值约等于4/3但不直接显示热力学温度转化,D更符合题干给出的表达;A、B方向错误。第11题:选B。由Q=cmΔT可知,在质量相同、吸收热量相同且热损失忽略时,升温ΔT越大,比热容c越小。甲升温较多,说明甲的比热容较小。密度、沸点与本题热量和升温关系无直接必然联系。第12题:选A。易挥发液体在皮肤表面蒸发,汽化需要吸热,热量主要来自皮肤和周围空气,皮肤温度降低,所以人感到凉。B是凝固放热,与题意相反;C、D不能解释快速降温的主要原因。第13题:选B。声波和光波在均匀介质界面上都可能发生反射和折射,这是两类波的共同现象。声必须依靠介质传播而光可在真空中传播,故A错;光在真空中的速度远大于声在介质中的速度,且声不能在真空传播,故C错;在同一介质中波速通常由介质决定,不一定随频率增大而增大,故D错。第14题:选D。一端封闭、一端开口的空气柱第一次共鸣对应四分之一波长,即L≈λ/4。已知L=17.0cm,则λ≈4L=68.0cm。B对应半波长关系,A和C不符合第一次共鸣的驻波长度条件。二、填空与基础题答案15.答案:600;0.80解析:超声到海底后反射返回,0.80s为往返时间。海深h=vt/2=1500×0.80/2=600m。若下一次发射早于本次回波返回,接收信号可能混淆,因此相邻两次发射时间间隔应大于0.80s。16.答案:0.686;混响或反射回响解析:20℃时声速v=331+0.6×20=343m/s。波长λ=v/f=343/500=0.686m。墙面吸声材料通过削弱反射声来减小混响,使后续反射声不遮蔽直达声。17.答案:1.70;1.80解析:平面镜成像与物体等大,像高仍为1.70m。靠近0.30m后,人距镜面0.90m,像到镜面也是0.90m,人与像距离为0.90+0.90=1.80m。18.答案:2.0×10^8;400解析:介质中光速v=c/n=3.0×10^8/1.50=2.0×10^8m/s。频率进入介质后不变,波长按折射率缩短,λ=600/1.50=400nm。19.答案:6.3×10^4;100解析:水吸收热量Q=cmΔT=4.2×10^3×0.50×(50-20)=6.3×10^4J。若实际加热功率为630W,则t=Q/P=6.3×10^4/630=100s。20.答案:减小;内解析:热气球内空气受热膨胀,在近似外界压强下单位体积质量减小,密度减小。燃料燃烧释放的化学能先转化为气体内能,使温度升高,再通过浮力做功转化为机械能。三、实验与材料分析题答案21.答案:(1)半个波长;(2)约342m/s;(3)偏小。步骤解析:一端封闭、一端开口的空气柱相邻两次共鸣,空气柱长度相差λ/2。第1组数据ΔL=51.2cm-17.0cm=34.2cm=0.342m,故λ=2ΔL=0.684m。声速v=fλ=500×0.684=342m/s。若不计管口校正,实际参与共鸣的有效空气柱长度略大于读数长度,直接按读数处理会使等效波长偏小,因此声速偏小。作答时要写清“相邻共鸣差值”而不是把第一次共鸣长度直接当作半波长。22.答案:(1)10.0cm;(2)远离透镜方向,变大;(3)像仍完整,亮度变暗。步骤解析:当u=v=20.0cm且像为倒立等大实像时,物距和像距均为2f,所以f=10.0cm。蜡烛移到12.0

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