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根據物體漂浮或懸浮時,受力平衡G=F浮;而G=物體質量*g=物體的密度*V物*g,F浮=液體密度*g*V排,所以:物體的密度*V物*g=液體密度*g*V排,即:物體的密度*V物*=液體密度*V排,那麼這個比例式就出來了(物體的密度/液體的密度=V排/V物)
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