I was dazing off in my physics class when I came up with this question and I was wondering about it all day. I could not provide myself with an adequate solution, so here I am asking the forum about it!
I know the community prefers generalizations, but for the sake of not being too confusing, I must be a bit specific for now.
We have a liquid of mass $M_l$ and density $D_l$ laying on a scale (which obviously reads "$M_l$"). A solid of mass $M_s$ and density $D_s$ is hanging by another scale (which again obviously reads "$M_s$"). We move the solid down so that it is halfway submerged in the liquid. (all masses in kg, densities in g/cm^3)
How will the masses read by the two scales change, if at all? Intuitively, I would say that the sum of the masses read by both scales would have to be the same as the original sum ($M1 +M2$) but I could be wrong. Density probably plays a key role.
Any help is appreciated :)