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- Express the specific weight, in U.S. Customary units (lb / in.^3), of a specimen of material that has a density of 4500 kg/ m^3Express the specific weight, in U.S. Customary units(lb / in.3), of a specimen of material that has a density of4500 kg/ m3A flue from an oil furnace to the chimney is made from 9 pieces of pipe. Afterbeing fitted together, each piece of pipe is 1 foot 101⁄2 inches long. What isthe total length of the flue?