If it floats it is less dense than water, 62.4 lbs/cubic ft. Wood is about 40 lbs/ cu.ft.–it floats. Concrete is 150 lbs. / cu.ft. — It does not float.
If it floats it is less dense than water, 62.4 lbs/cubic ft. Wood is about 40 lbs/ cu.ft.–it floats. Concrete is 150 lbs. / cu.ft. — It does not float.
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