Which of the Following is Not a Mechanism of Heat

Question

Which of the following is not a mechanism of heat loss?
A) conduction
B) emissivity
C) radiation
D) convection
E) none of the above

Accepted Answer

Emissivity is a property that describes how effectively a surface emits thermal radiation, but it is not a mechanism of heat loss itself. Conduction, radiation, and convection are the primary mechanisms of heat loss.