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buoyancy force , floating power
The buoyant force up equals the weight down.
向上的浮力等于向下的重量。
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The aluminum will float up when the magnetic buoyant force is large enough.
当磁性浮力足够大时,就能将铝球浮起来。
Buoyant force is equal to the weight of liquid displaced. It acts vertically upward.
浮力等于排开液体的体积, 方向垂直向上。
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