You place a beaker partly filled with water, into a sink. The beaker itself has a mass of 390grams and an interior volume of 500 cm^2. You now start to fill the sink with water and you f ind that if the beaker is less than half full, it floats but it is more than half full it sinks to the bottom. What is the density of the glass making up the beaker? The answer is 2786 kg/m^3 How do you do this? argh i got my final tomorrow =S 1. The problem statement, all variables and given/known data mass of beaker=0.39 kg density of water is 1000 kg/m^3 interior volume of beaker is 500 cm^2 2. Relevant equations Fb= density*g* Volume displaced 3. The attempt at a solution i don't know how to do this AT ALL!