中学生网络课堂
初二物理 (苏教版下册)
物体的浮与沉
本课配套习题挑战模式1/5
单选题
难度系数：
1.
端午节那天，小明发现煮熟的咸鸭蛋有的沉在水底，有的浮在水面（如图所示）. 若甲的体积比乙小，则下列分析合理的是（ ）
| A: 甲的质量比乙大 |
| B: 甲受到的浮力等于重力 |
| C: 甲的密度比乙大 |
| D: 乙受到的浮力大于重力 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5qC55o2u54q25oCB5Yik5pat5ZCE6Ieq5rWu5Yqb5ZKM6YeN5Yqb5YWz57O744CCPC9wPg==
- 提示2：PHA+5qC55o2u54q25oCB5Yik5pat5ZCE6Ieq5a+G5bqm5ZKM5rC05a+G5bqm5YWz57O744CCPC9wPg==
- 提示3：PHA+55+l6YGT5L2T56ev5YWz57O777yM55+l6YGT5a+G5bqm5YWz57O75Y+v5Lul5Yik5pat6LSo6YeP5YWz57O744CCPC9wPg==
- 答案：Qg==
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
本课配套习题挑战模式2/5
单选题
难度系数：
2.
把体积相等的甲、乙两个小球同时放入装有适量水的杯中，两球均沉在杯底（如图所示），向水杯中加入适量盐水后. 甲球上升，乙球仍沉在杯底. 对下列分析中正确的是（ ）
| A: 甲球的密度大于乙球的密度 |
| B: 加入盐水后，甲乙两球所受浮力相等 |
| C: 加入盐水后，乙球对杯底的压力变大 |
| D: 加入盐水后，甲球所受浮力变大，乙球所受浮力不变 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+54mp5L2T5ryC5rWu5Zyo5ray5L2T5LitLOeJqeS9k+WvhuW6puWwj+S6jua2suS9k+WvhuW6pjwvcD4=
- 提示2：PHA+54mp5L2T5rKJ5YWl5ray5L2T5bqV6YOoLOeJqeS9k+WvhuW6puWkp+S6jua2suS9k+WvhuW6pi48L3A+
- 提示3：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
- 答案：Qg==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.
将同一个正方体物体先后放入a、b、c三种液体中，物体静止时如图所示. 则下列判断正确的是（ ）
| A: 在三种液体中，物体受到的浮力相等 |
| B: 在三种液体中，物体受到的浮力不相等 |
| C: 液体的密度ρa＞ρb＞ρc |
| D: 在三种液体中，物体下表面受到的液体压强相等 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5Y+v5Lul5qC55o2u5rKJ5rWu54q25oCB5Yik5pat54mp5L2T5rWu5Yqb5YWz57O744CCPC9wPg==
- 提示2：PHA+5ray5L2T5a+G5bqm5YWz57O75Y+v5Lul6YCa6L+H54mp5L2T54q25oCB5Yik5pat44CCPGJyPjwvcD4=
- 提示3：PHA+5bqV6YOo5Y6L5by65Y+v55SoUD3PgWdo5Yik5pat44CCPGJyPjwvcD4=
- 答案：QQ==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.
一个球先后在盛有不同液体的容器A、B、C、D中保持静止状态，如图，四个容器中液面到容器底面的深度相同，容器底面受到液体压强最大的是（ ）
| A:
|
| B:
|
| C:
|
| D:
|
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5ray5L2T5rex5bqm55u4562J77yM6Zeu5Y6L5by65pyA5aSn55qE77yM5Y+q6KaB55+l6YGT5ray5L2T5a+G5bqm5aSn5bCP5Y2z5Y+v44CCPC9wPg==
- 提示2：PHA+6YCa6L+H54mp5L2T5rKJ5rWu54q25oCB5Yik5pat5ray5L2T5a+G5bqm44CCPC9wPg==
- 提示3：PHA+QeWvhuW6puacgOWkp++8jOaJgOS7peWOi+W8uuacgOWkp+OAgjwvcD4=
- 答案：QQ==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.
相同型号的甲、乙、丙三艘潜水艇，甲漂浮，受到的浮力为F甲；乙悬浮，受到的浮力为F乙；丙沉入海底，受到的浮力为F丙. 下列说法正确的是（ ）
| A: 漂浮和悬浮时，受到的浮力等于重力，F甲=F乙 |
| B: 乙悬浮时，浮力等于重力，丙沉入海底时浮力小于重力，F乙＞F丙 |
| C: 甲漂浮排开水的体积最小，丙沉入海底排开水的体积最大，F甲＜F乙＜F丙 |
| D: 甲漂浮时V排＜V物，乙和丙浸没时V排′=V物，F甲＜F乙=F丙 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6KaB5rOo5oSP77yM5r2c5rC06ImH5piv6Z2g5pS55Y+Y6Ieq6Lqr6YeN5Yqb5LiK5Y2H5LiL5rKJ55qE44CCPC9wPg==
- 提示2：PHA+5r2c5rC06ImH5LiN5Y+Y55qE5piv5L2T56ev77yM5pS55Y+Y55qE5piv6Ieq6Lqr6YeN5Yqb44CCPC9wPg==
- 提示3：PHA+6YCa6L+H5rW45rKh5ray5L2T5Lit5L2T56ev5Y+Y5YyW5rGC5rWu5Yqb5aSn5bCP44CCPC9wPg==
- 答案：RA==
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
