[題目] 一題浮力 (物體浮於水油之間)
一物體體積 100cm^3,密度0.76g/cm^3,
恰浮在油和水之間,油密度0.6g/cm^3,
求物體所受浮力?
(圖就是燒杯裝水,水上面放油,而油水分層那條水平線穿過物體)
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