Archimedes' Surprise

Suppose you have an iron (density 7.8 gm/cc) object floating in a pool of mercury (density 13.6 gm/cc).[br]Does the object rise or fall as if you pour water into the container? Why?[br]What happens if you pour an even denser liquid than water into the container? Why?
Archimedes' Surprise
You can vary the situation by using the density sliders.

Information: Archimedes' Surprise