1. The problem statement, all variables and given/known data An aluminum boat is floating in a swimming pool. A hole opens up in the bottom of the boat, and it sinks to the bottom of the pool. Does the water level rise, fall, or stay the same? 2. Relevant equations (Is the buoyancy equation applicable here?) 3. The attempt at a solution Intuitively I'd guess that water level would rise, since the boat displaces more water when it sinks... but does the weight of the boat while floating already account for this volume? I'm further confused because when an ice cube melts in a cup of water, the water level does NOT change because the mass of the cube when melted does not change. However, throwing rocks off a boat will cause water level to FALL, because the volume displaced by the rock is less than the volume it displaces due to its weight while in the boat. ... the more I think about this the more confused I get!