Video Transcript
Fill in the blank. Thermal energy is transferred from
the higher temperature end to the lower temperature end of a solid rod. This is an example of heat
blank. (A) Convection, (B) conduction, (C)
radiation.
In this example, we have an object
where one end is at a high temperature and the other is at a low temperature. We’re told that thermal energy is
transferred from the higher temperature end to the other one. We want to know what kind of heat
transfer is this. One important clue is that our
object is solid. That is, it’s not a liquid, and
it’s not a gas. The way that thermal energy is
transferred across solid objects is by the process called conduction.
Convection, option (A), is for
liquids and gases, while radiation applies when two objects exchange thermal energy
but aren’t in contact. Since we have a solid rod and
thermal energy is moving across it, this is an example of heat conduction.
