Two insulation foams have thermal conductivities of 0.030 W m⁻¹ K⁻¹ and 0.045 W m⁻¹ K⁻¹
PHYSICS · Subjective · CBSE · Physics · Thermal Properties of Matter · Thermal Properties of Matter
Problem
Two insulation foams have thermal conductivities of 0.030 W m⁻¹ K⁻¹ and 0.045 W m⁻¹ K⁻¹, respectively. For a wall of fixed area and a fixed temperature difference, which foam would require less thickness to limit the heat-loss rate to the same value? Briefly state your reasoning.