Coal, oil, or gas fires heat in furnaces and boilers heat buildings. The mixing of certain kinds of chemical also produce off heat. For example, if sulfuric acid and water are mixed together the mixture will become boiling hot. Nuclear energy Nuclear energy can produce great quantities of heat. Some nuclear weapons release too much heat at one time that it destroys most everything around them.
Nuclear energy is very important for someone s safety.
Some small weapons contain a very small fraction of nuclear energy. Friction Rubbing an object on another object can produce friction. Oil is put in machinery to reduce the amount of friction and so decreases the generation of heat. Oil will help the two objects from rubbing and producing friction to just slide across the other object. Humans make use of heat in appliances like oven, dryers, washers, and heaters.