Each type of object. When it gets hot the temperature increases and the increased length, that is, it has a linear expansion. Such a phenomenon describing the physical definition is.
Each object type When heated up to the temperature and the length is increased. It has a linear expansion unequal. Such a phenomenon is explained by the physical definition.
Each object type. When the heating temperature is increased and increased length is It has a linear expansion are not equal. Such phenomena explain the definition of physics.