本课配套习题挑战模式1/5
小伟同学利用天平和量筒测橙汁的密度,下列操作步骤中多余的是( )
A: 将橙汁倒入烧杯中,用天平测量烧杯和橙汁的总质量 |
B: 将烧杯中的橙汁倒入量筒中一部分,测出量筒中橙汁的体积 |
C: 用天平测量烧杯和剩余橙汁的总质量 |
D: 用天平测量空烧杯的质量 |
- 提示1:PHA+6KaB6ZmN5L2O5qmZ5rGB57KY5Zyo5p2v55Kn5LiK5a+55rWL6YeP55qE5b2x5ZON44CCPC9wPg==
- 提示2:PHA+5Y+q6ZyA6KaB5YCS5Ye65LiA6YOo5YiG77yM5rWL5L2T56ev44CCPC9wPg==
- 提示3:PHA+5LiN6ZyA6KaB5rWL56m654On5p2v55qE6LSo6YeP44CCPC9wPg==
- 答案:RA==
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
本课配套习题挑战模式2/5
小明利用天平和量杯测量某种液体的密度,得到的数据如下表,根据数据绘出的图象如图所示. 则量杯的质量与液体的密度是( )
A: 20g,1.0×103kg/m3 |
B: 60g,0.8×103kg/m3 |
C: 60g,1.0×103kg/m3 |
D: 20g,0.8×103kg/m3 |
- 提示1:PHA+5LiN6KaB5b+Y6K6w54On5p2v5Lmf5piv5pyJ6LSo6YeP55qE44CCPC9wPg==
- 提示2:PHA+54On5p2v55qE6LSo6YeP5pivMjBn44CCPC9wPg==
- 提示3:PHA+5Y+v5Lul55So6LSo6YeP5beu5q+U5LiK5L2T56ev5rGC5a+G5bqm44CCPC9wPg==
- 答案:QQ==
PGRpdj7op4Llr5/lm77osaHlj6/nn6XvvJrlvZPkvZPnp6/kuLow5pe26LSo6YeP5pivMjBn77yM5omA5Lul54On5p2v6LSo6YeP5Li6MjBn77yb5b2T5L2T56ev5Li6NjBjbTxzdXA+Mzwvc3VwPuaXtui0qOmHj+S4ujgwZ++8jOa2suS9k+i0qOmHj+S4uu+8iDgwLTIw77yJZ+WNs++8ms+B77ydbS9277ydKDgwLTIwKWcvNjBjbTxzdXA+Mzwvc3VwPu+8nTEuMDxpPmc8L2k+LzxpPmNtPC9pPjxzdXA+Mzwvc3VwPu+8nTEuMMOXMTA8c3VwPjM8L3N1cD48aT5rZzwvaT4vPGk+bTwvaT48c3VwPjM8L3N1cD48L2Rpdj4=
本课配套习题挑战模式3/5
在测量食盐水的密度时,小华先测出空烧杯的质量,再把食盐水倒入烧杯中,测出烧杯和食盐水的总质量,最后把烧杯中食盐水倒入量筒中,测出食盐水的体积. 那么她这样操作测出来的密度和真实值相比( )
A: 偏大 |
B: 偏小 |
C: 一样 |
D: 无法比较 |
- 提示1:PHA+54On5p2v5YaF5aOB5LiK5pyJ5q6L55WZ44CCPC9wPg==
- 提示2:PHA+5Zyo56ew6YeP5pe277yM56ew6YeP5LqG5q6L55WZ55qE6LSo6YeP5L2G5piv5rKh5pyJ6K6h566X5a6D55qE5L2T56ev44CCPGJyPjwvcD4=
- 提示3:PHA+6LSo6YeP5aSa56ew6YeP5LqG77yM57uT5p6c5YGP5aSn44CCPC9wPg==
- 答案:QQ==
PGRpdj7mnKzpopjkuK3lsI/ljY7mtYvph4/nmoTnm5DmsLTnmoTotKjph4/mmK/lh4bnoa7nmoTvvIzlsIbng6fmna/kuK3nmoTnm5DmsLTlgJLlhaXph4/nrZLkuK3ml7bvvIzkuIDpg6jliIbnm5DmsLTpmYTnnYDlnKjng6fmna/lhoXlo4HkuIrvvIzkvb/ph4/nrZLkuK3nm5DmsLTnmoTkvZPnp6/lj5jlsI/vvIzor7vmlbDlj5jlsI/vvIzmoLnmja7lr4bluqblhazlvI/PgT1tL3blvpflh7rnmoTmtrLkvZPnmoTlr4bluqbkvJrlgY/lpKcuPC9kaXY+
本课配套习题挑战模式4/5
A: 天平和秒表 |
B: 米尺和量筒 |
C: 天平和玻璃杯 |
D: 天平和米尺 |
- 提示1:IOW/hemhu+acieWkqeW5s+a1i+i0qOmHj+OAgg==
- 提示2:IOexs+Wwuu+8jOenkuihqOiCr+WumueUqOS4jeS4iuOAgg==
- 提示3:IOetieS9k+enr+azleOAgg==
- 答案:Qw==
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
本课配套习题挑战模式5/5
①用天平测出空矿泉水瓶的质量为m
②在矿泉水瓶中装满水,用天平测出总质量为m1
③将水倒出,在矿泉水瓶中装满酒精,用天平测出总质量m2
④用量筒测出矿泉水瓶中酒精的体积为V
⑤计算酒精的密度
这些步骤中可以省去( )
A: ①或③ |
B: ②或④ |
C: ③或④ |
D: 一步都不能省去 |
- 提示1:IOacieWkqeW5s++8jOaciemHj+etkua1i+a2suS9k+WvhuW6puOAguacgOeugOWNleeahOaWueazleOAgg==
- 提示2:IOeUqOWkqeW5s+a1i+a2suS9k+i0qOmHj++8jOeUqOmHj+etkua1i+a2suS9k+S9k+enr+OAgg==
- 提示3:IOWmguaenOayoeaciemHj+etku+8jOmcgOimgeeUqOWIsOawtO+8jOeUqOetieS9k+enr+azleensOmHj+OAgg==
- 答案:Qg==
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