Two types of wall separate a refrigerated room from the rest of a building. Wall 1 has half the thermal conductivity of wall 2. Wall 2 is half as thick as wall 1. The two walls have the same area. The rate of heat flow through wall 2 compared with the rate of heat flow through wall 1 is

Question

Quizplus · Accepted Answer

The rate of heat flow through a wall is proportional to the thermal conductivity and the area of the wall, and inversely proportional to the thickness of the wall. Since wall 1 has half the thermal conductivity of wall 2, and wall 2 is half as thick as wall 1, the rate of heat flow through wall 2 is the same as the rate of heat flow through wall 1.

Two Types of Wall Separate a Refrigerated Room from the Rest