本课配套习题挑战模式2/5
观光潜艇在水面下下潜的过程中,受到的()
A: 浮力变大,压强变大 |
B: 浮力变大,压强不变 |
C: 浮力变小,压强变小 |
D: 浮力不变,压强变大. |
- 提示1:PHA+6KeC5YWJ5r2c6ImH5Zyo5rC06Z2i5LiL5LiL5r2c55qE6L+H56iL5Lit77yM5Y+X5Yiw55qE5rWu5Yqb5LiN5Y+YPC9wPg==
- 答案:RA==
PHA+6KeC5YWJ5r2c6ImH5Zyo5rC06Z2i5LiL5LiL5r2c55qE6L+H56iL5Lit77yM5Y+X5Yiw55qE5rWu5Yqb5LiN5Y+Y77yM5Y6L5by65Y+Y5aSn77yI5o6S5byA5ray5L2T55qE5L2T56ev5LiN5Y+Y77yM5omA5Lul5rWu5Yqb5LiN5Y+Y77yM5ray5L2T5Y6L5by66K6h566X5YWs5byP77yM5ray5L2T5Y6L5by66Lef5rex5bqm5oiQ5q2j5q+U77yM5omA5Lul5Y6L5by65Y+Y5aSn77yJ6YCJRDwvcD4=
本课配套习题挑战模式3/5
分别用木头、铜、铁制成甲、乙、丙三个小球,将它们放在水中,三个小球静止时位置如图所示,以下判断正确的是( )
A: 甲小球一定是空心的 |
B: 乙小球一定是空心的 |
C: 丙小球一定是空心的 |
D: 三个小球都是实心的 |
- 提示1:PHA+5qC55o2u5ZCE5Liq5bCP55CD55qE54q25oCB77yM5oiR5Lus5Y+v5Lul5Yik5pat5Ye65rWu5Yqb5LiO6YeN5Yqb5LmL6Ze055qE5aSn5bCP5YWz57O7PC9wPg==
- 答案:Qg==
PHA+5pyo5aS05bqU6K+l5ryC5rWu77yM6ZOc6Lef6ZOB5Lya5Zyo5rC05bqV77yM5omA5Lul5oKs5rWu55qE5LmZ55CD5LiA5a6a5piv56m65b+D6YeR5bGe55CD77yM6YCJQjwvcD4=
本课配套习题挑战模式4/5
质量相同的A、B两个正方体,当它们在水中分别静止在如图所示位置时,正方体底部受到的水的压力分别为FA、FB,则对FA、FB大小判断正确的是()
A: FA大 |
B: FB大 |
C: 一样大 |
D: 无法确定 |
- 提示1:PHA+QeaCrOa1ru+8jELmvILmta7vvIxB44CBQui0qOmHj+ebuOetie+8jOaJgOS7pUHjgIFC5omA5Y+X5rWu5Yqb55u4562JPC9wPg==
- 答案:QQ==
PHA+QuWPl+WIsOeahOa1ruWKm+etieS6jkLnmoTkuIvooajpnaLlj5fliLDnmoTmsLTnmoTljovlipvvvIxB5Y+X5Yiw55qE5rWu5Yqb562J5LqO5LiL6KGo6Z2i5Y+X5Yiw55qE5Y6L5Yqb5YeP5Y675LiK6KGo6Z2i5Y+X5Yiw55qE5Y6L5Yqb77yb5omA5LulQeW6lemDqOWPl+WIsOeahOWOi+WKm+Wkp+S6jkLlupXpg6jlj5fliLDnmoTljovlipvvvI7mlYXpgIlB77yOPC9wPg==
本课配套习题挑战模式5/5
在盛有水的圆柱形容器中,质量为m的均匀木球漂浮在水面上,静止时有一半体积露出水面。当用竖直向下恒定的压力F使木球恰好全部没入水中时,水没有溢出,木球没有接触容器。下列判断正确的是
A: 在木球逐渐进入水的过程中,所受合力保持不变 |
B: 在木球逐渐进入水的过程中,所受合力逐渐变小 |
C: 木球全部进入水中后与漂浮在水面时相比,水对容器底部的压力增加mg/2 |
D: 撤销压力F后木球在上浮过程中,所受的合力逐渐变大 |
- 提示1:PHA+5pyo55CD5byA5aeL5pe26Z2Z5q2i5Zyo5rC06Z2i5LiK77yM5omA5Y+X5rWu5Yqb5LiO6YeN5Yqb55u4562J77yM5b2T5pa95Yqg5Y6L5Yqb5pe277yM5ZCI5Yqb562J5LqO5Y6L5YqbRjwvcD4=
- 答案:Qg==
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