* Liquid: Water is a liquid at 0 degrees Celsius, but it is at its freezing point. This means that it is in equilibrium between liquid and solid states.
* Solid (ice): At 0 degrees Celsius, water can also exist as a solid (ice). This is because the temperature is at the freezing point, and any further decrease in temperature would result in the liquid water turning into ice.
So, the physical state of water at 0 degrees Celsius depends on the specific circumstances and the presence of any impurities. It can be either liquid water at its freezing point or solid ice.
