1. The problem statement, all variables and given/known data We fully submerge an irregular 3 kg lump of material in a certain fluid. The fluid that would have been in the space now occupied by the lump has a mass of 2 kg. a) When we release the lump, does it move upward, downward, or remain in place? b) If we next fully submerge it in less dense fluid and again release it, what does it do? 2. Relevant equations Fb=mfg 3. The attempt at a solution For a) I just assumed that Fg is > b since the mass of the lump is greater than the mass of the water displaced. I know that for b) it also goes downward, but why? Does density simply not matter because it's not factored into the equation for buoyancy or would the result be different if we submerged the lump in a fluid that is more dense?