Which number on this figure indicates transfer of thermal energy by a convection cell?
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 transfer of thermal energy by a convection cell? 
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

The transfer of thermal energy by a convection cell occurs when heated water expands and rises to the top of the pan and then cools and flows back down, creating a convection current. Choice A involves conduction, choice B involves radiation, and choice D involves simply moving the pan away from the stove without any heat transfer occurring.

Which Number on This Figure Indicates Transfer of Thermal Energy