1. Automobile engine:
When a car is started on a cold day, it's a good idea to let the engine heat up before trying to drive. This heat helps the fluids in the engine become more liquid, and helps components like the fan and drive belts be more malleable and less prone to snapping. After the engine has run for a few minutes, the hood of the car will feel warmer to the touch. Any frost or snow on the hood may begin to melt. This is an example of conduction as the heat generated in the engine fills the compartment that houses it; the metal components that hold the engine in place have also heated up due to direct contact with the heat source. The entire hood compartment becomes warmer due to the conduction of heat through metal contact and air temperature inside the hood.