A foam plastic ( p = 0.58 g/cm 3 ) is to be used as a life
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A foam plastic (ρp = 0.58 g/cm3) is to be used as a life preserver. What volume of plastic must be used if it is to keep 20 percent (by volume) of an 80-kg man above water in a lake? The average density of the man is 1.04 g/cm3.
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