Heat from burning fuel warms the walls of the firebox section of the furnace in

Heat from burning fuel warms the walls of the firebox section of the furnace inside it. This is convection. Another example is when When a pot of water sits on a hot stove, the metal pot is heated, and then transfers its heat to the water. A student claims that conduction is the only type of heat transfer occurring. The statement that explains why the student’s idea is incorrect Conduction cannot occur between two different phases of matter. 

The answer is a 0.64 volts

Ireally don’t know