Which number on this figure indicates heating by conduction?
A)1,direct contact between the burner and the pan
B)2,heating by thermal radiation through the air
C)3,heated water expands and rises to the top of the pan and then cools and flows back down
D)4,moving a pan of water away from the stove

Question

Which number on this figure indicates heating by conduction? 
A)1,direct contact between the burner and the pan 
B)2,heating by thermal radiation through the air 
C)3,heated water expands and rises to the top of the pan and then cools and flows back down 
D)4,moving a pan of water away from the stove

Quizplus · Accepted Answer

Heating by conduction occurs through direct contact between two objects with different temperatures. In this figure, option A shows the direct contact between the burner and the pan, which is the process of heating by conduction. Option B refers to heating by thermal radiation, option C describes convection, and option D describes the process of removing the pan from the heat source, which does not involve any heating process. Thus, the correct choice is A.

Which Number on This Figure Indicates Heating by Conduction