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

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

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Heat and Mass Transfer
According to Prevost theory of heat exchange

Heat transfer by radiation requires no medium
All bodies above absolute zero emit radiation
Heat transfer in most of the cases takes place by combination of conduction, convection and radiation
It is impossible to transfer heat from low temperature source to t high temperature source

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