What is the density of a block that has the dimensions of 2.5 cm, 3.2 cm, and 5.4 cm, and a mass of 6.38 g?
Density is simply mass per unit volume, which has the dimensions
So we take the mass (in grams) and divide by the volume, which is the product of the linear dimensions:
Now even if I get the arithmetic wrong, I certainly have the right units for density. Would this block float on water? Why or why not?