大学物理
把一长为2cm的钢针轻放在液体表面上并使钢针浮着，若液体的表面张力系数为0.02N/m，那么钢针的重量为（D）A，0.0002NB,0.0001NC,0.0004ND,0...
把一长为2 cm的钢针轻放在液体表面上并使钢针浮着，若液体的表面张力系数为0.02N/m，那么钢针的重量为（D ）
A，0.0002N B,0.0001N C,0.0004N D,0.0008N E,0.0016N
求解答过程 展开
A，0.0002N B,0.0001N C,0.0004N D,0.0008N E,0.0016N
求解答过程 展开
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