中学生网络课堂
初二物理 (人教版下册)
物体的浮沉条件及应用
本课配套习题挑战模式1/5
单选题
难度系数：
1.
在本节课程当中，我们提到了万能公式，关于万能公式下列表述正确的是
| A: 排开液体体积的变化量，等于容器内物体底面积乘以液面上升（或下降）高度 |
| B: 排开液体体积的变化量，等于容器底面减去物体底面积积再乘以液面上升（或下降）高度 |
| C: 排开液体体积的变化量，等于容器底面积乘以液面上升（或下降）高度 |
| D: 排开液体体积的变化量，等于容器底面积加上物体底面积再乘以液面上升（或下降）高度 |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+5LiH6IO95YWs5byP5ZKM5a655Zmo5bqV6Z2i56ev5ZKM5ray6Z2i5Y+Y5YyW5pyJ5YWz44CCPGJyPjwvcD4=
- 提示2：PHA+5LiH6IO95YWs5byP77ya5o6S5byA5ray5L2T5L2T56ev55qE5Y+Y5YyW6YeP77yM562J5LqO5a655Zmo5bqV6Z2i56ev5LmY5Lul5ray6Z2i5LiK5Y2H77yI5oiW5LiL6ZmN77yJ6auY5bqmPC9wPg==
- 提示3：PHA+5YaN5LiN5Lya5bCx6ZyA6KaB5YaN55yL5LiA6YGN6KeG6aKR44CCPC9wPg==
- 答案：Qw==
PGRpdj7kuIfog73lhazlvI/vvJo8aW1nIHNyYz0iaHR0cHM6Ly9wMi5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvOEQvckJBQ0ZGTU1acTdBMWVEMUFBQUNaVFhPZGxRNTYxLnBuZyIgZGF0YS1ja2Utc2F2ZWQtc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC84RC9yQkFDRkZNTVpxN0ExZUQxQUFBQ1pUWE9kbFE1NjEucG5nIiBoZWlnaHQ9IjIxIiB3aWR0aD0iOTYiPu+8jOS4h+iDveWFrOW8j++8muaOkuW8gOa2suS9k+S9k+enr+eahOWPmOWMlumHj++8jOetieS6juWuueWZqOW6lemdouenr+S5mOS7pea2sumdouS4iuWNh++8iOaIluS4i+mZje+8iemrmOW6pjwvZGl2Pg==
本课配套习题挑战模式2/5
单选题
难度系数：
2.
如图所示，底面积S1=20cm2的圆柱形容器内放有横截面积为S2=5cm2的试管，试管内装有砂子，试管和砂子总质量为100g，从试管中取出60g砂子后，相对于液面试管将上升（）
| A: 10cm |
| B: 11cm |
| C: 12cm |
| D: 13cm |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6aKY5Lit6Zeu55qE5piv55u45a+55LqO5ray6Z2i6K+V566h5LiK5Y2H6auY5bqm77yM6ICM5LiN5piv5a655Zmo44CC5omA5Lul5LiN6ICD6JmR5ray6Z2i5LiL6ZmN6auY5bqm44CCPC9wPg==
- 提示2：PHA+6YCa6L+H5rWu5Yqb5Y+Y5YyW6YeP5Y+v5Lul5rGCVjxzdWI+5o6SPC9zdWI+5Y+Y5YyW6YeP44CCPGJyPjwvcD4=
- 提示3：PHA+VjxzdWI+5o6SPC9zdWI+5Y+Y5YyW6YeP562J5LqO6K+V566h5bqV6Z2i56ev5LmY5Lul5LiK5Y2H6auY5bqm44CCPGJyPjwvcD4=
- 答案：Qw==
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
本课配套习题挑战模式3/5
单选题
难度系数：
3.
如图所示，底面积S1=20cm2的圆柱形容器内放有横截面积为S2=5cm2的试管，试管内装有砂子，试管和砂子总质量为100g，从试管中取出60g砂子后，相对于容器试管将上升（）
| A: 10cm |
| B: 9cm |
| C: 8cm |
| D: 7cm |
一次做对，真牛！
+5奖励规则>
- 提示1：PHA+6aKY5Lit6Zeu55qE5piv55u45a+55LqO5a655Zmo6K+V566h5LiK5Y2H6auY5bqm77yM5omA5Lul6KaB6ICD6JmR5ray6Z2i5LiL6ZmN6auY5bqm44CCPC9wPg==
- 提示2：PHA+6YCa6L+H5rWu5Yqb5Y+Y5YyW6YeP5Y+v5Lul5rGCVjxzdWI+5o6SPC9zdWI+5Y+Y5YyW6YeP44CCPC9wPg==
- 提示3：PHA+VjxzdWI+5o6SPC9zdWI+5Y+Y5YyW6YeP562J5LqO6K+V566h5bqV6Z2i56ev5LmY5Lul5LiK5Y2H6auY5bqm44CCPGJyPjwvcD4=
- 答案：Qg==
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
本课配套习题挑战模式4/5
单选题
难度系数：
4.在一圆柱形容器中盛有水，水面漂浮着一个小容器，将一个实心小塑料球放入小容器中后，大容器中的水面上升高度h1，如图所示。若把这个塑料球从小容器拿出投入大容器的水中，液面又降低了h2，这个塑料小球的密度是( )
A:  |
B:  |
C:  |
D: |
一次做对，真牛！
+5奖励规则>
- 提示1：IOesrOS4gOasoea2sumdouS4uuS7gOS5iOS4iuWNh+esrOS6jOasoea2sumdouS4uuS7gOS5iOS4i+mZjQ==
- 提示2：IOmAmui/h+esrOS4gOasoea2sumdouS4iuWNh+WPr+S7peaxguWHuuWwj+WhkeaWmeeQg+eahOa1ruWKm0Y9PGltZyB3aWR0aD03IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzLzdEL3JCQUNFMU1NWnI2RHY4cTJBQUFBOURVeG9MTTM3Ni5wbmciPjxzdWI+5rC0PC9zdWI+Z3M8c3ViPuWkpzwvc3ViPmg8c3ViPjE8L3N1Yj7jgILmta7lipvnrYnkuo7lsI/nkIPph43lipvjgII=
- 提示3：IOesrOS6jOasoea2sumdouS4i+mZjeWPr+S7peaxguWHuuWwj+eQg+eahOS9k+enr+OAglY8c3ViPueQgzwvc3ViPj1zPHN1Yj7lpKc8L3N1Yj7vvIhoPHN1Yj4xPC9zdWI+LWg8c3ViPjI8L3N1Yj7vvIk=
- 答案：Qg==
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
本课配套习题挑战模式5/5
单选题
难度系数：
5.如图所示，底面积为Sb的圆柱形容器内盛有适量的水，另一底面积为Sa的圆柱体A有部分体积浸入水中，当圆柱体A相对于容器下降高度h时（水没有溢出，圆柱体也未全部没入水中），物体A所受水的浮力的增加量为（）
A:  |
B:  |
C:  |
D:  |
一次做对，真牛！
+5奖励规则>
- 提示1：IOaDs+aDs+S4h+iDveWFrOW8j++8jDxpbWcgd2lkdGg9NDkgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMDAvOEUvckJBQ0ZGTU1ac0doaHp5T0FBQUJwVjQ5a2FZMzU3LnBuZyI+PHN1Yj5iPC9zdWI+PGltZyB3aWR0aD0xNiBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AxLnFpbmdndW8uY29tL0cxL00wMC8yMy83RC9yQkFDRTFNTVpzR1FPaDFuQUFBQmQxMm4tdlkyODQucG5nIj48c3ViPua2sjwvc3ViPuOAgg==
- 提示2：IOeJqeS9k+Wwj+WwhmjvvIzlkIzml7bmtrLpnaLkuIrljYc8aW1nIHdpZHRoPTE2IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzLzdEL3JCQUNFMU1NWnNHUU9oMW5BQUFCZDEybi12WTI4NC5wbmciPjxzdWI+5rayPC9zdWI+77yM5omA5LulPGltZyB3aWR0aD0zNyBoZWlnaHQ9MjEgc3JjPSJodHRwczovL3AyLnFpbmdndW8uY29tL0cxL00wMC8wMC84RS9yQkFDRkZNTVpzR1E5OENxQUFBQmJYSll6WUkzMDUucG5nIj5TPHN1Yj5hPC9zdWI+77yIaCs8aW1nIHdpZHRoPTE2IGhlaWdodD0yMSBzcmM9Imh0dHBzOi8vcDEucWluZ2d1by5jb20vRzEvTTAwLzIzLzdEL3JCQUNFMU1NWnNHUU9oMW5BQUFCZDEybi12WTI4NC5wbmciPjxzdWI+5rayPC9zdWI+77yJ
- 提示3：IOS4pOW8j+ebuOetieaxguWHuua2sumdouWPmOWMlumHjzxpbWcgd2lkdGg9MTYgaGVpZ2h0PTIxIHNyYz0iaHR0cHM6Ly9wMS5xaW5nZ3VvLmNvbS9HMS9NMDAvMjMvN0QvckJBQ0UxTU1ac0dRT2gxbkFBQUJkMTJuLXZZMjg0LnBuZyI+PHN1Yj7mtrI8L3N1Yj7jgII=
- 答案：RA==
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
