There are three variations on the same theme. You sitting on
earth in your laboratory and throw three solid spherical objects into a pot of water.
What conclusions can you make about the density of A, B and C
in each case.
What conclusion can you make if any about the total mass of A, B and C.

Here is
another variation.
What conclusions can you draw.

Note the size of A, B and C remain the same as above, but we have changed the Density of each.

And a
third case!

If you come up with
some answers and reasons about I, II and III, please share them with
me