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13问答网 > “青岛号”导弹驱逐舰满载时的排水量是4800吨，此舰满载时所受的浮力是______N．当舰从海洋驶入长江时，

“青岛号”导弹驱逐舰满载时的排水量是4800吨，此舰满载时所受的浮力是______N．当舰从海洋驶入长江时，

2025-03-15 20:36:47

推荐回答（1个）

回答1：

（1）F_浮=G_排=m_排g=4800×10³kg×10N/kg=4.8×10⁷N．
（2）∵轮船在海洋、长江上都漂浮，自重不变，
∴轮船在海上和在长江上受到的浮力都等于自重，大小不变．
（3）∵轮船受浮力不变，ρ_海水＞ρ_江水，
∴由F_浮=ρ_液V_排g得：
排开海水的体积比排开江水的体积小，要下沉一些．
故答案为：4.8×10⁷；不变；下沉．

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