*Net* thermal energy exchanged?

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SUMMARY

The discussion centers on the thermal energy exchange between two objects at the same temperature. The key conclusion is that while the net thermal energy exchanged is zero (statement D), there is still a continuous exchange of thermal energy in both directions, contradicting statement C. The participant argues that both statements C and D can be interpreted as correct, emphasizing the distinction between net exchange and individual energy flow.

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  • Knowledge of thermal radiation principles
  • Basic grasp of internal energy and thermal capacity
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  • Explore the concept of thermal radiation and its implications
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  • Investigate practical examples of thermal energy exchange in real-world scenarios
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Greg777
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Homework Statement



Hello, I have the following problem (an ABCD question):

Two objects near each other are at the same temperature. Which of the following statements has to be true?
A. The objects have the same internal energy.
B. The objects have the same thermal capacity.
C. No thermal energy is exchanged between the objects.
D. The net thermal energy exchanged between the objects is zero.

Homework Equations


I think there are none, it's rather conceptual.

The Attempt at a Solution


[/B]
I think there's nothing wrong with C but according to the markscheme the correct one is D. Well, I think that both C and D are correct. If C is wrong, if the objects are at the same temperature how may there be any exchange of thermal energy between them?
 
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They both emit thermal radiation, for example. The net exchange is zero but there is a constant flow of energy in both directions.
 
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