Formula for Density
The formula for density is D=m/v (Density equals mass over volume)
This means that density is equal to the amount of matter "stuff" in an
object in a certain amount of space, or volume. In SI units, density can
be measured in kilograms per cubic meter , or grams per cubic
centimeter.
Recall that we see density written like these examples:
13.534 grams per cubic centimeter (density of metallic liquid mercury)
1 pound per cubic foot (density of a "common" form of styrofoam)
Note that the volume measurements are in units, or in "just one" of the
specified volume measures. We reduce the volume to get a "one" or to
get that single unit. For instance, if we had styrofoam, and we measured
2 pounds of it and it had the volume of 2 cubic feet, we'd reduce that
by dividing by 2 so we could get a single unit of the specified volume
in our statement of density.
A last example might be that
if we had 45 grams per 3 cubic centimeters, we'd have 15 grams per cubic
centimeters after the division to get that single unit volume.
A link is posted below to the Wikipedia article on density if you'd care to surf on over and have a look.
http://xenontics.blogspot.com/
