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【免费下载】精编天津市静海区瀛海学校20202021学年九年级10月月考物理试题

  • 2026-01-14 14:53:59
【免费下载】精编天津市静海区瀛海学校20202021学年九年级10月月考物理试题

一、单项选择题

二、(每题2分,共20分)

1.

2.初福州森林公园的梅花开得好美,小雪不禁想起“墙角数枝梅,凌寒独自开,遥知不是, 为有暗香来”。漫步丛中,她闻到淡淡梅花香,其原因是(  )

A. 分子很小B. 分子间存在引力

C. 分子在不停地做无规则运动D. 分子间存在斥力

2. 关于内能、温度和热量的下列说法中,正确的是(  )

A. 高温物体具有的内能一定比低温物体多

B. 物体的温度越高,含有的热量越多

C. 物体的内能增加,可能是发生了热传递

D. 物体的内能增加,一定是对物体做了功

3. 如图甲所示,让毛皮摩擦过的橡胶棒,使验电器A带了电,B不带电。用带有绝缘柄的金属棒把验电器A、B两金属球连接起来的瞬间(如图乙所示),金属棒中(  )

A. 电流方向由A到BB. 电流方向由B到A

C. 有电流但方向无法确定D. 始终无电流

4. 寒冷的冬天,双手摩擦会感到手发热,放到暖气片上会感到手暖和,对于这两种做法,下列说法正确的是(  )

A. 两种方法都是利用做功的方式来增大手的内能

B. 两种方法都是利用热传递的方式来增大手的内能

C. 前者是利用做功的方式来增大手的内能,后者是利用热传递的方式来增大手的内能

D. 前者是利用热传递方式来增大手的内能,后者是利用做功的方式来增大手的内能

5. 如图所示的四个冲程不是按照热机正常工作的顺序排列的,你认为让汽车获得动力的冲程是( )

A. B. C. D. 

6. 由于国际原煤价格上涨,少数不法商人把一种黑色石头掺在优质煤中高价出售,客户为了不上当受骗,辨别煤中是否有掺杂的最恰当的方法是检测下面哪一个物理量(  )

A. 质量B. 温度C. 热值D. 比热容

7. 质量相等、初温相同的甲、乙两种不同液体,分别用两个完全相同的加热器加热,加热过程中,温度随时间变化的图线如图所示.根据图线可知(

A. 甲液体的比热容比乙的大B. 乙液体的比热容比甲的大

C. 甲、乙的比热容一样大D. 无法比较甲、乙的比热容大小

8. 如图所示的四种情景中,属于内能转化为机械能的是(  )

A. B. C. D. 

9. 关于热机效率,以下说法中正确的是(  )

A. 热机做的有用功越多,效率就一定越高

B. 热机单位时间耗费的燃料少,热机的效率就一定高

C. 热机效率越高,机器做功越快

D. 做相同的有用功时,废气带走的能量越少,机器的效率越高

10. 如图所示的四个电路中,与实物图对应的是

A. B. 

C. D. 

二、不定项选择题(每小题3分,共12分)

11. 关于内能的知识,下列说法正确的是(  )

A. 一杯水和一桶水,若它们的温度相同,则他们的内能相同

B. 0℃的冰块也有内能

C. 冬天用“热水袋”暖手是用热传递的方式改变物体内能

D. 比热容越大的物体,所具有的内能就越大

12. 关于电路的知识,下列说法中不正确的是(  )

A. 规定正电荷移动的方向为电流方向

B. 为使两灯同时亮,同时灭,两灯一定要串联

C. 金属导体中的电流方向跟自由电子定向移动的方向相反

D. 只要有电源,电路中就能有持续的电流

13. 如图所示是一种声光报警器电路,各元件均能正常工作。下列现象描述正确的是(  )

A. 只闭合S2时,铃响,灯不亮B. 只闭合S1时,铃响,灯亮

C. 同时闭合S1、S2,铃响,灯不亮D. 同时闭合S1、S2,灯亮,铃不响

三、填空题(每空2分,共34分)

14. 晓雯将几滴蓝墨水滴入一杯水中,如图甲所示,观察到整杯水慢慢变蓝,这种现象说明分子在 _____ ;晓军同学先将注射器筒内吸入适量的水,推动活塞使筒内空气排除后,用手指堵住注射器嘴,再用力推活塞,如图乙所示,结果发现筒内水的体积几乎未改变,这一现象表明分子间存在着相互作用的 ________ 。

15. 质量相等的水和冰,升高的温度相同时,水吸收的热量要比冰吸收的热量______,这是因为__________。

16. 如图所示,在一试管里装入质量为100 g的干燥沙子,用软木塞把管口封住,在塞中插入温度计,测得此时沙子的温度为l8℃;然后用手指捏住试管上部上下晃动。过一会儿,发现温度计的示数变为20℃。沙子的温度之所以升高,是因为晃动试管时,试管内的沙子互相摩擦做功,_____能转化为内能,沙子内能增加,温度升高;在这一过程中,沙子的内能增加了_____J。[沙子的比热容为0.92×103 J/(kg•℃)]。

17. 如图所示,当试管内水沸腾时,软木塞突然被冲出来,其原因是试管内水蒸气对软木塞___,此过程中水蒸气的内能转化为软木塞的___.

18. 在如图所示的电路中,有三个开关S1、S2、S3 ,如果仅将开关S3闭合,S1、S2断开,则灯L1、L2_______联;如果将开关S1、S2闭合,S3断开,则灯L1

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  1. CONNECT:[ UseTime:0.000538s ] mysql:host=127.0.0.1;port=3306;dbname=no_yeyulingfeng;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.000809s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000321s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000254s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.000482s ]
  6. SELECT * FROM `set` [ RunTime:0.000162s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.000633s ]
  8. SELECT * FROM `article` WHERE `id` = 461052 LIMIT 1 [ RunTime:0.006902s ]
  9. UPDATE `article` SET `lasttime` = 1768395104 WHERE `id` = 461052 [ RunTime:0.002022s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 66 LIMIT 1 [ RunTime:0.000212s ]
  11. SELECT * FROM `article` WHERE `id` < 461052 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.000377s ]
  12. SELECT * FROM `article` WHERE `id` > 461052 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.000538s ]
  13. SELECT * FROM `article` WHERE `id` < 461052 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.001364s ]
  14. SELECT * FROM `article` WHERE `id` < 461052 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.002530s ]
  15. SELECT * FROM `article` WHERE `id` < 461052 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.000605s ]
0.088458s