Density and Masses

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DENMystery-I.GIF (21875 bytes)

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.

DENMystery-II.GIF (21859 bytes)
DENMystery-III.GIF (22129 bytes)

And a third case!

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

RW Kluiber 5/18/98