1. The problem statement, all variables and given/known data I was having a lecture of buoyancy and I am confused about the meaning of displaced water. I asked my classmates about it and they said it is essentially the volume of the object when you put the object into the water. So now the question comes. There are three objects placed into three different cups of water. Object A floats. Object B sits in the middle of the water and object C sinks. Compare the mass, volume, density of each object to the mass, volume and density of the "displaced water" they are sitting in, respectively? 2. Relevant equations F = PA P = pgh B = pgV 3. The attempt at a solution Okay, I think I just do not get what the question is talking about. If the displaced water is the volume of the object, what does mass, volume, and density of the displaced water mean? Volume of displaced water should simply mean volume of the object, and density of displaced water should just be density of water (I am guessing here, correct me if I am wrong). But what is the mass of the displaced water? Does that mean mass of the volume of object, which means mass of the object? I am comparing the mass of object to mass of displaced water. If they are the same, how do I compare!!!