Carly places one end of a steel bar in a Bunsen flame and the other end in an ice cube.By what factor is the rate of heat flow changed when the bar's cross-sectional area is doubled?

Question

Quizplus · Accepted Answer

According to Fourier's law of heat conduction, the rate of heat flow is directly proportional to the cross-sectional area. When the area is doubled, the rate of heat flow will also double. Therefore, the factor by which the rate of heat flow changes is 2.

Carly Places One End of a Steel Bar in a Bunsen