From the table or densities found in this experiment iron has a density of 7.85 g/cm^3 and water has a density of 1.0 g/mL iron is denser than water and will sink when placed in water Explain how ships made iron stay afloat using density principles

The comparison of the number of atoms in a copper coin the size of a penny with the number of people on earth is made to illustrate which of the following? a. that atoms are indivisible b. that atoms are very small c. that atoms are very large d. that in a copper penny, there is one atom for every person on earth