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【免费下载】精编江苏省泰州市靖江市靖城中学校际联盟20222023学年八年级下学期5月月考物理试题

  • 2026-02-18 20:19:50
【免费下载】精编江苏省泰州市靖江市靖城中学校际联盟20222023学年八年级下学期5月月考物理试题

2022-2023学年度第二学期阶段质量监测调研

八年级物理试题

第一部分选择题(共24分)

一、选择题(每小题只有一个选项符合题意,共12小题,每小题2分,共24分)

1. 下列数据不合理的是(  )

A. 一个鸡蛋的体积约为50cm3

B. 一本苏科版初中物理教材平放时对水平桌面的压强约为50Pa

C. 一间中学教室内的空气质量约为50kg

D. 一瓶5L的塑料瓶装矿泉水重约为50N

【答案】C

【解析】

【详解】A.一个鸡蛋的体积约为50cm3,故A合理,不符合题意;

B.一本人教版初中物理教材的重力约为2.5N,平放在桌面上时与桌面的接触面积约0.05m2,对水平桌面的压强

B合理,不符合题意;

C.一间中学教室的体积约为180m3,教室内空气的质量为

C不合理,符合题意;

D.一瓶5L的塑料瓶装满矿泉水的质量为

重力为

G=mg=5kg×10N/kg=50N

D合理,不符合题意。

故选C

2. 下列关于粒子和宇宙的说法中正确的是(  )

A. 海绵可以被压缩,说明分子间有空隙

B. 汤姆生发现了电子,说明原子核仍可再分

C. 地球等行星绕太阳运动,说明太阳是宇宙的中心

D. 毛皮摩擦过的橡胶棒所带的负电荷是从毛皮上转移来的

【答案】D

【解析】

【详解】A.海绵被压缩,是因为海绵内有空洞,它不能说明分子间有间隙,故A错误;

B.汤姆生发现了电子,说明原子仍可再分,故B错误;

C.地球等行星绕太阳运动,说明太阳是太阳系的中心,不是宇宙的中心,故C错误;

D.毛皮摩擦过的橡胶棒带负电,根据电荷守恒定律可知,其所带的负电荷是从毛皮上转移来的,故D正确。

故选D

3. 某学习小组参观无锡石墨烯产业发展示范区时,了解到石墨烯具有以下特性:坚硬、几乎完全透明、导电性和导热性出色。下列物品中不适合使用石墨烯制作的是(  )

A. 防弹衣B. 特种玻璃C. 隔热手套D. 太阳能电池

【答案】C

【解析】

【详解】由材料知石墨烯具有坚硬、透明、导电性、导热性等物理性质。

A.防弹衣材料要求要坚硬,石墨烯有坚硬的特性,故A不符合题意;

B.特种玻璃要求硬度大、透明等,而石墨烯具有坚硬、几乎透明的特性,故B不符合题意;

C.隔热手套要求导热性不强,而石墨烯导热性出色,隔热手套不适合使用石墨烯制作,故C符合题意;

D.太阳能电池要求导电性能好,石墨烯导电性很好,可用于制造太阳能电池,故D不符合题意。

故选C

4. 甲、乙、丙三个轻质小球的相互作用情况如图所示,已知甲所带电荷与被丝绸摩擦过的玻璃棒所带电荷相同,关于丙球的带电情况判断正确的是(  )

①可能带负电②可能带正电

③可能不带电④一定带负电

A. ①③B. C. ①②D. ①②③

【答案】A

【解析】

【详解】根据题目可知甲与被丝绸摩擦过的玻璃棒带电荷相同,由此判断出甲带正电。根据图示可知,甲与乙球互相排斥,说明它们带有同种电荷,且甲球带正电,因此乙球也带正电。又因为丙球与乙球相互吸引,由异种电荷相互吸引和带电物体可吸引轻小物体可知,丙球的带电情况可能是不带电,也可能带负电,因此①③说法正确。故A正确,BCD错误。

故选A

5. 小明将两个塑料吸盘紧压后,“吸”在一起。以下“吸”的原理与此相同的是(  )

A. 用吸管能将饮料“吸”入嘴中

B. 长期使用的风扇叶会“吸”灰尘

C. 两个表面刮净的铅块紧压后“吸”在一起

D. 两艘军舰如果并排航行,会因相“吸”而撞到一起

【答案】A

【解析】

【分析】

【详解】将两个塑料吸盘接触并挤压,里面的空气被挤出、气压减小,吸盘内部的气压小于外界大气压,吸盘在大气压的作用下被“吸”在一起。

A.先把吸管内的空气吸走,在外界大气压的作用下,饮料被压进吸管里,此现象与大气压有关,故A符合题意;

B.风扇转动的过程中与空气摩擦,使扇叶带上了电荷;带电体的性质是可以吸引轻小的物体,所以扇叶就把灰尘吸附在表面上了。故B不符合题意;

C.两个表面刮净的铅块紧压后“吸”在一起,说明分子间存在引力,故C不符合题意;

D.两艘并排航行的轮船,若两艘船靠的比较近且并排前进,两船内侧的水流速度大,外侧的水流速小,根据流体压强与流速的关系可知:两船内侧的水的压强小于两船外侧水的压强,在这个压强差的作用下,两船会向中间靠拢,出现相撞的情形,故D不符合题意。

故选A

6. 同一密度计先后放在密度为ρρ的液体中,静止时所处位置如图所示,密度计在两种液体中所受浮力分别为F甲浮F乙浮。下列选项中正确的是(  )

A. ρρB. ρρ

C. F甲浮F乙浮D. F甲浮F乙浮

【答案】B

【解析】

【分析】

【详解】C D.密度计在不同的液体中漂浮,故浮力等于重力,同一个重物,故浮力相同,故CD错误;

A B.浮力相同,根据可知,甲的排开液体体积大,故甲的密度小,故A错误;B正确。

故选B

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  1. CONNECT:[ UseTime:0.000441s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000580s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000242s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000272s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000521s ]
  6. SELECT * FROM `set` [ RunTime:0.000211s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000465s ]
  8. SELECT * FROM `article` WHERE `id` = 469111 LIMIT 1 [ RunTime:0.003906s ]
  9. UPDATE `article` SET `lasttime` = 1771478879 WHERE `id` = 469111 [ RunTime:0.002446s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000268s ]
  11. SELECT * FROM `article` WHERE `id` < 469111 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000408s ]
  12. SELECT * FROM `article` WHERE `id` > 469111 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001171s ]
  13. SELECT * FROM `article` WHERE `id` < 469111 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.007772s ]
  14. SELECT * FROM `article` WHERE `id` < 469111 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.000755s ]
  15. SELECT * FROM `article` WHERE `id` < 469111 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.001495s ]
0.088672s