题目内容
The critical Reynolds number of a rough-walled pipe is about _______.
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An energy interaction is heat transfer if its driving force is a _______ difference.
The rate of heat conduction through a plane layer is inversely proportional to _______ .
In _______ , it is due to the combination of vibrations of the molecules in a lattice and the energy transport by free electrons.
Heat transfer processes that involve change of phase of a fluid are considered to be _______ because of the fluid motion induced during the process.
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