Recent content by curioussoul09

What is "empty space"? I always hear this term: "empty space." It is synonymous with "vacuum," but I am having trouble understanding either of these two ideas. How can space be "empty?"

Homework Statement Why does water volume increase when heated past 4 degrees Celsius? 2. The attempt at a solution I know that water molecules move quicker when energy is applied (e.g. heat), but I don't understand why the volume of water must increase. Why can't water molecules just move...