[今日更新]2023-2024学年度上学期高三年级自我提升四(HZ).物理试卷答案

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[今日更新]2023-2024学年度上学期高三年级自我提升四(HZ).物理试卷答案试卷答案

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thewhitekind-isn'tonthelist,brownriceis.W:ThenIthinkwewillswitchtothattokeepthefamilyhealthy.Superfoodssoundlikeaverytastywaytokeepfit.(Text9)W:What'stheproblem?M:I'vebeengettingapaininmyforeheadrecently.W:Haveyouhadanycoldsorflurecently?M:Ihadacoldacoupleofweeksago,butthat'sgone.W:Areyoustudyingalot?Areyougettingenoughsleep?M:Yes.I'mstudyingquitealot,butI'mmakingsuretosleepplenty.Iusuallygotobedaround11,andIamupatabouteight,soIhavetimetogorunningforhalfanhourbeforegoingtotheuniversityatnine.W:Quitehealthy.Hasthispainkeptyouawake?M:Yes,itmakesgettingtosleepharder.It'smuchworseattheendoftheday.Ihardlyno-ticeitinthemorningorintheafternoon.W:Areyoueatingproperly?M:Ithinkso.Mymothercooksmymeals.W:Youdon'twearglasses,right?Whendidyoulasthaveyoureyesexamined?M:WhenIwasachild.W:Thatmaybetheproblem.Ithinkyoushouldgetthatdoneagain.Inthemeantime,takethispillwhenyou'reinpain,andcometoseemeagaininaweek.M:OK.Thankyou.(Text10)M:Sellingyourthingsonlinehelpsyougetridofthoseyoudon'tneed,anditcanalsobeagreatsourceofincome.Onethingyouneedtoconsidercarefullyistheplatformonwhichyouaregoingtoadver-tise.Mostbigplatformsinthefieldaresopopularwithsellers,notjustbecausetheycangiveyouaccesstoabiggerpoolofpotentialcustomers,butalsobecausetheyofferinsurance.Thedisadvantage,however,isthatyouwillneedtopaysomemoneyforusingtheplat-form.Youcanusesomeplatformsthateitherchargeasmallerfeeforadvertisingorevennofeeatall-but,inthatcase,whatyouwillneedtokeepinmindisyoursafety.It'salwaysbesttomeetthebuyerduringthedayatapublicplacesuchasacoffeeshop,alibrary,orasupermarketparkinglot-anywheremonitoredbysecuritycamerasisgood.Afewmorethingstokeepinmind:alwaysbeaccuratewithyourdescriptionsofthethingsyouareselling.Thelastthingyouwantistobeaccusedofcheatingandbannedfromthewebsite.Moreover,becarefulwithyourpersonalinformation.【23·G3DY(新教材老高考)·英语·参考答案一R一必考一Y】

14.(14分)下图是大型户外水上竞技闯关活动中“渡河”环节的简化图.固定在地面上的圆弧轨道上表面光滑.质量为4m的平板浮于河面上,其左端紧靠着圆弧轨道,且其上表面与轨道末端相切.平板左侧放置质量为m的橡胶块A.质量为5m的人从圆弧轨道上与平板高度差为h=1.8m处由静止滑下,人与A碰撞后经t1=0.4s与平板速度相等,此时A恰好冲出平板并沉人水中,不影响平板运动.已知人、橡胶块与平板间的动摩擦因数均为0.5;平板受到水的阻力是其所受浮力的k倍(k=0.1)..平板碰到河岸立即被锁定.河面平静,水的流速忽略不计,整个过程中有足够的安全保障措施.人、橡胶块A可看作质点,重力加速度g取10m/s^2,求:(1)人与橡胶块A相撞之后,在速度相等之前,人的加速度a1、橡胶块A的加速度a2、平板的加速度a3分别为多大?(2)人与橡胶块A相撞之后,人的速度v1、橡胶块A的速度v2的大小;(3)若“渡河”过程中,平板能够碰到河岸,则河岸宽度的最大值dm.

13.(10分)一宇航员站在某质量分布均匀的星球表面上沿竖直方向以初速度v0,向上抛出一个小球,测得小球经时间t落回抛出点,已知该星球半径为R,万有引力常量为G,求:(1)该星球表面的重力加速度g;(2)该星球的密度ρ

9.如图所示为航母电磁弹射装置的简易图,当连接舰载机的导体通有电流时,舰载机在强磁场的恒定电磁力下加速,使舰载机获得一足够的初速度,连接舰载机的导体与舰裁机的总质是为m,运动过程所受的阻力为其重力的k=0.5倍,重力加速度为g.关闭弹射装置,舰载机加速的距离为x时起飞,舰载机起飞的速度为v=2gx;如果启动弹射装置,舰载机加速的距离为时起飞,舰载机的牵引力恒定.下列说法正确的是A.关闭弹射装置,舰载机的牵引力与重力的比值为2:3B.启动弹射装置,弹射装置对舰载机做功为mgxC.启动弹射装置,弹射装置与牵引力做功之比为2:1D.仅增加电流,则舰载机加速的距离减小