You will need
  • Know from the table the density of a substance the exact density, which characterizes the substance of the original body.
For clarity, it is necessary to consider an example. For example, given a concrete block, the volume of which is 4 m?. Now, turning to the table of densities of various substances shows that the density of concrete is 2300 kg/m?
Table of densities of various substances
Now, according to the formula for finding body mass, you can calculate:
m = 2300*4 = 9200 kg.
Thus, the mass of the concrete block with a volume of 4 m? will amount to 9.2 tons.