One end of a rod is heated. The atoms at this end of the rod start to vibrate more energetically. These atoms collide with nearby atoms and energy passes from the
hotter to cooler atoms. As you are holding the rod in your hand, you feel the heat
from the end being warmed move to the cooler end of the rod. The process of the
heat conducted through the rod measured as its
A. thermal emissivity.
B. thermal reflectivity.
C. thermal expansivity.
D. thermal conductivity.