Application of Physics (Applied Physics)

In our routine life we all are use Physics rules in different fields. Application of physics mean that how and where can use or apply the physics laws. In daily life use of electricity and other electric appliances. Physics has many Applications, mostly in engineering and also in Chemistry ,Biology and in Computer sciences.  
Physics explain to us how remove heat of a Car Engine. Why white and shiny roof make cool inside the house? why do not put the metals in ovens?
Shape and structure of Molecules and Atoms deals with interaction between them.