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# How to calculate density - Office Equipment & Supplies

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Density is defined as the ratio of the mass of a substance to the volume occupied by that substance.
To represent density one use the Greek letter RHO (looks like a rounded p)
RHO= mass/volume
Unit of density is gram/ cm^3 or kg/m^3
Relative density is the ratio of the density of a substance to the density of pure water (at about 4 degrees Celsius). In this relation both densities must be expressed in the same units.

Posted on Nov 17, 2013

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A cubic foot is a unit of volume. A pound can be a unit od mass (weight) or a currency. Either way a volume cannot be converted into a mass nor a currency.
If you are doing homework read carefully the question to figure out what substance they are talking about.
Once you know the substance look up its density or specific gravity and do the calculation
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As you see, if you know the density (specific gravity) in pounds per cubic foot, you can calculate the mass of any volume of that substance (in cubic feet).

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