1 By comparison, machine shops also cut metal, but they are more concerned with the machining of parts on machine tools. 2  Firms that encompass both fab work and machining are also common. 3  Blacksmithing has always involved fabrication, although it was not always called by that name.
When water is in its solid state (ice) , the water molecules are packed close together preventing it from changing shape. Ice has a very regular pattern with the molecules rigidly apart from one another connected by the hydrogen bonds that form a crystalline lattice.
1 Supercooling-Hot water tends to experience less of a supercooling effect than cold water. 2  This makes it more likely to become solid when it reaches the freezing point of water.3  Convection-Water develops convection currents as it cools. This makes it more likely to become solid when it reaches the freezing point of water. 2  Convection-Water develops convection currents as it cools. 3  Water density usually decreases as temperature increases, so a container of cooling water typically is warmer on top than on the bottom.