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Science / Density
why does an iron boat float but a lump of iron sinks
An iron boat floats because its overall density is less than that of water due to the air-filled space within it.
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An iron boat floats because it is painted with a special waterproof coat.
An iron boat floats because it is lighter than a lump of iron.
An iron boat floats because it is driven by mechanical propulsion.
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