For the transmission of heat from one body to another__________?
Correct answer: A. temperature of the two bodies must be different
- A. temperature of the two bodies must be different
- B. both bodies must be solids
- C. both bodies must be in contact
- D. at least one of the bodies must have some source of heating
Explanation
Net heat transfer requires a temperature difference, and the bodies need not be solids or in direct contact because radiation and convection can transfer heat across space. A separate heating source is also unnecessary once a temperature difference exists.
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