1. The problem statement, all variables and given/known data A bottle, full of air at atmospheric pressure, whose volume is 500 cubic centimeters, is sunken mouth downwards below the surface of a pond. How far must it be sunk for 100 cubic centimeters of water to run up into the bottle? 2. Relevant equations 3. The attempt at a solution The only things i know are that the pressure at the level of the bottle opening must be the same inside and outside. But I'm not sure how to find the depth needed.