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如右圖,不計繩重,滑輪重及摩擦,物體浸入水中,拉力F為200克重系統平衡,若將水槽移走,使物體懸於空氣中,拉力F增為250克重。才可使滑輪不動,則該物體密度為多少克/厘米3。[87北聯]
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Posted in 液體的浮力.
Tagged with 張力, 沉體, 浮力, 滑輪.
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By admin – 2009 年 06 月 06 日
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