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.
Electricity is very important to us and if there weren t for electricity we would still be taking a candle everywhere and taking chalk to write with. Heat and energy can not be seen but the work they do is in our ovens and other appliances. Heat and energy make gases expand and provide power to work. The temperature of an object determines if it is going to loose energy or loose some when it comes in contact with another object. The atoms and molecules will stop until there is heat to be given to them to move again.