Your friends are installing a loft in their room and are using thin speaker wires to provide power to an extra outlet. If they draw only a small amount of current from the outlet, the voltage drop in each of the wires will remain small. Why?

The radiation of the fire causes the saucepan to heat up. the conduction of the saucepan then to distribute the heat over the saucepan and to give heat to the water. the convection of the water distributing the heat within the water, till all the water is boiling