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Densities of Common Materials

DENSITIES OF COMMON MATERIALS @ STP
iron or steel 7850 kg/m3 (490 lbm/ft3)
earth soils 1920 kg/m3 (120 lbm/ft3)
concrete 2400 kg/m3 (150 lbm/ft3)
sea water (liquid) 1025 kg/m3 (64 lbm/ft3)
water (liquid) 1000 kg/m3 (62.4 lbm/ft3)
water (solid) 920 kg/m3 (490 lbm/ft3)
mercury (liquid) 13560 kg/m3 (490 lbm/ft3)