Final answer:
Electrical wires are made from metals coated with rubber to combine the conductivity of metals with the insulation of rubber for safety. Similarly, metal pans are used for cooking because metals are also effective thermal conductors, efficiently transferring heat.
Step-by-step explanation:
Electrical wires are often made from metals like copper or aluminum because they are excellent electrical conductors. These metals have a high density of free electrons which allows electricity to flow through them with ease. To ensure safety and prevent short circuits, these metal wires are coated with an insulating material like rubber which does not conduct electricity, thus preventing accidental electric shocks or fires.
Similarly, metal pans are used in cooking because metals are also good thermal conductors. They efficiently transfer heat from the stove to the food, making cooking more effective and uniform. This property of metals being excellent conductors of both electricity and heat is utilized in their respective applications for conducting wires and cooking utensils.