对缸内理想气体，平放时为初态：p1=p0，v1=L0s 悬挂时为末态：对缸体，Mg+p2s=p0s v=LS 即P2＝P0? Mg s 由玻意耳定律：p1 v1=p2 v2，得：P0L0s＝(P0? Mg s )Ls 代入数据得：气柱长度为L＝ P0L0s P0s?Mg 答：气柱长度为 P0L0s P0s?Mg
