1. In a vacum,there are no atoms or molecules.Explain why conduction does not oocure in a vacum.
2.Some stew pots made of stainless steel are copper plated.Explain how this design helps spread heat more evenly.(Hint: Stainless steel is not a very gd conductor compared to copper).
3.A polyfoam container is used to keep food warm
(a). Describe the heat flow in this case
(b). How can a polyfoam container keep food warm?
(c). What happens of a polyfoam container os folled woth cold food in summer?