Heat and Mass Transfer
Wien’s law states that the wave length corresponding to ________ is proportional to the absolute temperature.

Both (A) and (B)
Minimum energy
None of these
Maximum energy

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Heat and Mass Transfer
In counter flow heat exchangers

Both the fluids at exit are in their hottest state
Both the fluids at inlet are in their hottest state
Both the fluids at inlet (of heat exchanger where hot fluid enters) are in their coldest state
One fluid is in hottest state and other in coldest state at inlet

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