Learning Forum

[cfdjannis]

I mean that the value of the density isn't straight or linear:Usually, substances expand when they are heated. But if you heat water starting at 0°C, you will notice something weird:At first, the volume of the liquid does not get bigger, but smaller! Up to a temperature of 4°C, the water contracts when heated. Once it has reached that temperature, it starts to expand with increasing temperature just like other fluids. That means water has a higher density at 4°C than at any other temperature. [http:/www.vias.org/kas/en/water_anomaly.html]nBut yes, it still has just one density for each temperature...