Two rods of the same cross-sectional area having thermal conductivities 60 W m⁻¹ K⁻¹ and 40 W m⁻¹ K⁻¹ and lengths 0.2 m and 0.3 m are connected in series. The effective thermal conductivity of the combination is ______ W m⁻¹ K⁻¹.
Physics · Mixed Chapter
Two rods of the same cross-sectional area having thermal conductivities 60 W m⁻¹ K⁻¹ and 40 W m⁻¹ K⁻¹ and lengths 0.2 m and 0.3 m are connected in series. The effective thermal conductivity of the combination is ______ W m⁻¹ K⁻¹.