![](https://img.xkw.com/dksih/QBM/editorImg/2022/12/21/6c10dbc6-08ac-483c-a8ff-108520eb2926.png?resizew=144)
A.空气柱B的长度减小 | B.左侧水银面高度差h2减小 |
C.空气柱B的压强增大 | D.右侧水银面高度差h1增大 |
(1)用外力F将活塞缓慢提升4cm,求此时汽缸内气体的压强;
(2)对汽缸内气体缓慢加热,当温度升到57℃时,气体吸收了10J的热量,求此过程中气体内能的增加量。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/21/1bdb9681-b780-4e31-8458-ddaa06496cb2.png?resizew=157)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/e2aa5397e6e63e5cb721479ec46bd166.png)
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![](https://staticzujuan.xkw.com/quesimg/Upload/formula/9086f58b99bfd8d2b929f26bf98fb8ec.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7092b2e953e0359983553acc79efa27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d5e1a4798bdde4af5e86faf08e2461fd.png)
(1)第一次打气时活塞下移多大距离时,阀门K打开?
(2)至少打几次可以使篮球内气体的压强增加到
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/87c6f018bc5953a0f67d03123d7ebd2c.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/1/3/5274f141-755a-4c3f-aed9-317bc6f99b03.png?resizew=254)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/d9695b98027e41b97a62d07c80925fc8.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/0436b65927f7e677e6f8b1d2c0c63213.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5e83009e9a9e4a9b2f7792fd7ee3bcc2.png)
(1)若在砂桶中逐渐加入砂子,求活塞刚接触卡环时砂桶(含砂)的总质量M;
(2)若不在砂桶中加入砂子,对缸内气体缓慢加热,求气体的热力学温度
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/71284938793976c2ec8b79c82e93b7fd.png)
![](https://img.xkw.com/dksih/QBM/editorImg/2022/11/25/b0483000-7d98-4db3-8c81-5dd0dd949d3f.png?resizew=167)
5 . 如图所示,一粗细均匀的细管开口向上竖直放置,管内有一段高度为 4.0cm的水银柱,水银柱下密封了一定质量的理想气体,水银柱上表面到管口的距离为2.0cm。若将细管倒置,水银柱下表面恰好位于管口处,且无水银滴落,管内气体温度与环境温度相同。已知大气压强为76cmHg,环境温度为297K。
(1) 细管倒置后,气体吸热还是放热;
(2)求细管的长度;
(3)若在倒置前,缓慢加热管内被密封的气体,直到水银柱的上表面恰好与管口平齐为止,求此时密封气体的温度。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/99834d454015b2db7e83ad057fc3a976.png)
(1)气体A的压强;
(2)气体A的气柱长度;
(3)活塞移动的距离为多大?
![](https://img.xkw.com/dksih/QBM/editorImg/2023/12/24/92154c78-0120-4251-912b-d4b2f5d94b87.png?resizew=276)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f881cb9071ca8fea7cef4ab8d4865589.png)
(1)扳下锁扣过程中空腔内气体吸热还是放热?
(2)求板下锁扣后空腔内气体的压强p1;
(3)若挂钩挂上重物时恰好不脱落,求所挂重物的质量M。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/8/ac938af7-68f8-4935-9258-27562ce282c2.png?resizew=178)
![](https://img.xkw.com/dksih/QBM/editorImg/2023/4/8/975da720-8ab1-43b9-85c1-a67d8551656f.png?resizew=287)
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8 . 将一个内壁光滑的汽缸开口朝右静置于光滑水平面上,汽缸质量为M=3kg,横截面积为S=20cm2。用一质量为m=2kg的活塞将一定质量的理想气体密封在汽缸内,开始时活塞离汽缸底部的距离为l=40cm,现对汽缸施加一水平向左、大小为F=100N的拉力,如图所示。已知大气压强p0=1.0×105Pa,密封气体的温度、大气压强均保持不变,汽缸足够长,不计空气阻力,施加拉力作用当系统达到稳定状态后。求:
(1)汽缸的加速度大小;
(2)活塞离汽缸底部的距离。
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6170442004c8b768805b458c09ef168a.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/6967ec3aaf9e7e6a9d90533b8ff61d10.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/342b67a5b65b812fe081ce49c8f73d56.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/bf648ca793a1a7b174a3af44da28e672.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/5b25e0570ac53937ed7be8c3e624a280.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/8f6bc1260c85220c7ebd26100de26bf5.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/b7092b2e953e0359983553acc79efa27.png)
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/fe3791ce5b19e83e0633e21854ceccfa.png)
(1)状态B气体的压强
![](https://staticzujuan.xkw.com/quesimg/Upload/formula/f918208e279fe6be9305411c423c1800.png)
(2)气体处于状态B时外力大小F;
(3)状态A到B过程外界对气体做的功W。
![](https://img.xkw.com/dksih/QBM/editorImg/2023/3/24/c27b0239-9716-49ce-8b0e-8f4e4a5d8dad.png?resizew=237)
(1)初始状态气缸内压强p1;
(2)仅将活塞和砝码的总质量增大至10kg时,汽缸内气体高度h2;
(3)在(2)的基础上,打开阀门K,充气装置向气缸内充气,当汽缸内气体高度最终恢至h1时,求充入的外界大气的体积V。