An engineer needs to increase the steady-state rate of heat conduction through an…
PHYSICS · Subjective · A Level · Physics · Further mechanics and thermal physics · Further mechanics and thermal physics
Problem
An engineer needs to increase the steady-state rate of heat conduction through an aluminum bar by a factor of six while keeping both the material and the temperature difference across the bar unchanged. Mechanical constraints require that the product of the bar’s cross-sectional area A and its length L remains constant. By what factor must the length L be multiplied to meet the goal?