In this process it absorbs the latent heat from the surroundings and chamber. Any substance, hot or cold, put inside the flask remains so for a considerable period as there is a no exchange of heat due to radiation because of the silvering nor due to conduction or convection. Thermos flask is generally used for preserving hot tea, coffee or ice, cold Drinks, etc. A part of the heat of the flame transmitted to the gauze goes out by convection and radiation to the surrounding medium. If explosive gases like methane burn inside the lamp, the fire does not come out as the wiregauge absorbs most of the heat and the temperature outside does not reach ignition point.
Atomic energy is liberated by an atomic pile attached to the submarine.
The liquid circulating through the atomic pile becomes very hot and the heat exchanger changes water into steam. This steam moves a turbine, connected to an electric generator and the electricity produced by the generator drives the submarine. An electrical conductor moves across a magnetic filed and electric current is induced. There is a powerful filed magnet, between the poles of which the armature is rotated. This mechanical energy is converter into electrical energy in the form of a current in the armature.