Thermodynamics involving rods and heat transfer with conduction

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SUMMARY

The discussion focuses on heat conduction between two identical rectangular metal rods, one at 0 degrees Celsius and the other at 100 degrees Celsius. In a scenario where the rods are welded end to end, 10 joules of heat is conducted in 2 minutes. The main question arises when considering the configuration change to side by side, prompting a need to understand the impact of length and cross-sectional area on heat transfer. The equation referenced, "10*A/L=T2L/A," indicates a relationship between heat transfer, area, and length, but lacks clarity without specific dimensions.

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  • Knowledge of thermal conductivity and its units
  • Familiarity with the concepts of heat transfer area and length in conduction
  • Basic algebraic manipulation skills for solving equations
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goodiegrady
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ok...Two identical rectangular rods of metal are welded end to end (hot dog to hot dog) with a temperature of 0 celsius on the left side and a temperature of 100 celsius on the right side. in 2 min 10 joules is conducted at a constant rate from the right side to the left side. How much time would be required to conduct 10 J if the rods were welded side to side {hamburger to hamburger}.

NO lengths mentioned which is what I am stuck on. I can get to 10*A/L=T2L/A through Q/T. K would cancel so would Q. not sure what to do with length and area as these are kind of important but not listed any ideas??
 
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What is the basic equation you are using here? I don't see how you got to "10*A/L=T2L/A". It may be right, I just don't see how you got there.
 

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