Question

What two ways does a thermos limit heat conduction?

Answer 1

A thermos limits heat conduction through a double-walled design and a reflective coating.

Step-by-step explanation:

A thermos limits heat conduction in two main ways:

1. The thermos is constructed with a double-walled design, creating a vacuum between the inner and outer walls. This vacuum acts as an insulator, preventing heat transfer through conduction. The rubber support shown in Figure 14.30 provides additional support and insulation.
2. The inside walls of the thermos are coated with a reflective material, usually made of silver. This reflective coating reduces heat transfer through radiation by reflecting heat back into the thermos, rather than allowing it to escape.