If the temperature on the warmer side of a wall is doubled,the rate at which heat is conducted through the wall
A)doubles.
B)increases by a factor of 4.
C)decreases by a factor of 4.
D)is cut in half.
E)increases but the rate cannot be determined.

Question

Quizplus · Accepted Answer

The rate of heat conduction through a wall is proportional to the temperature difference across the wall, according to Fourier's law of heat conduction. If the temperature on the warmer side is doubled, the new rate of heat transfer depends on the original temperatures on both sides of the wall. Without knowing the initial temperature of the cooler side, we cannot determine the exact factor by which the rate increases.

If the Temperature on the Warmer Side of a Wall