Question: Two cylindrical rods have the same mass. One is made of silver (density =10 500 kg/m3), and one is made of iron (density =7860 kg/m3).

Two cylindrical rods have the same mass. One is made of silver (density =10 500 kg/m3), and one is made of iron (density =7860 kg/m3). Both rods conduct the same amount of heat per second when the same temperature difference is maintained across their ends. What is the ratio (silver-to-iron) of?

(a) The lengths and

(b) The radii of these rods?

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