The molten iron was then rapidly cooled by immersion in water. They are often cooled by liquid nitrogen. The mixture is then cooled to become a jelly. They must be cooled to cryogenic temperatures during operation. After boiling, the hopped wort is now cooled, ready for the yeast. At high loads, the exhaust is cooled by the coolant, lowering fuel consumption. After heating is complete, the solution can then be cooled. People are typically cooled for a 24-hour period, with a target temperature of . That vapor is cooled, condensed, and collected at point C. They are then cooled and removed from the water. MSRs can be cooled in various ways, including using molten salts. The milk is immediately cooled down and packed into a sterile container. The reaction is exothermic, therefore the reactor must be cooled. It is not generally cooled in Norway, but similarly enjoyed slowly. While in the expanded state it is rapidly cooled.