6.一石块在空气中用弹簧秤称得示数为G,浸没在水中(ρ1)时示数为G1,( A )浸没在水中(ρ1)时示数为G1,浸没在密度为ρ2的液体中示数为G2,则ρ2的值为 ( A )
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![6.一石块在空气中用弹簧秤称得示数为G,浸没在水中(ρ1)时示数为G1,( A )浸没在水中(ρ1)时示数为G1,浸没在密度为ρ2的液体中示数为G2,则ρ2的值为 ( A )](/uploads/image/z/11235899-11-9.jpg?t=6.%E4%B8%80%E7%9F%B3%E5%9D%97%E5%9C%A8%E7%A9%BA%E6%B0%94%E4%B8%AD%E7%94%A8%E5%BC%B9%E7%B0%A7%E7%A7%A4%E7%A7%B0%E5%BE%97%E7%A4%BA%E6%95%B0%E4%B8%BAG%2C%E6%B5%B8%E6%B2%A1%E5%9C%A8%E6%B0%B4%E4%B8%AD%28%CF%811%29%E6%97%B6%E7%A4%BA%E6%95%B0%E4%B8%BAG1%2C%28+A+%29%E6%B5%B8%E6%B2%A1%E5%9C%A8%E6%B0%B4%E4%B8%AD%28%CF%811%29%E6%97%B6%E7%A4%BA%E6%95%B0%E4%B8%BAG1%2C%E6%B5%B8%E6%B2%A1%E5%9C%A8%E5%AF%86%E5%BA%A6%E4%B8%BA%CF%812%E7%9A%84%E6%B6%B2%E4%BD%93%E4%B8%AD%E7%A4%BA%E6%95%B0%E4%B8%BAG2%2C%E5%88%99%CF%812%E7%9A%84%E5%80%BC%E4%B8%BA+%28+A+%29)
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6.一石块在空气中用弹簧秤称得示数为G,浸没在水中(ρ1)时示数为G1,( A )浸没在水中(ρ1)时示数为G1,浸没在密度为ρ2的液体中示数为G2,则ρ2的值为 ( A )
6.一石块在空气中用弹簧秤称得示数为G,浸没在水中(ρ1)时示数为G1,( A )
浸没在水中(ρ1)时示数为G1,浸没在密度为ρ2的液体中示数为G2,则ρ2的值为 ( A )
6.一石块在空气中用弹簧秤称得示数为G,浸没在水中(ρ1)时示数为G1,( A )浸没在水中(ρ1)时示数为G1,浸没在密度为ρ2的液体中示数为G2,则ρ2的值为 ( A )
选A
受到的浮力分别为:(G-G1)和(G-G2),而排除液体的体积相等,故有
(G-G1)/ ρ1=(G-G2)/ ρ2
故 ρ2=[(G-G2)/ (G-G2)]ρ1