Heat Transfer
The statement that "maximum wavelength of radiation is inversly proportional to the temperature" is __________ law.

Wien's displacement
None of these
Stefan-Boltzman's
Planck's

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Heat Transfer
Prandtl number is the ratio of

Momentum diffusivity to thermal diffusivity
Thermal diffusivity to mass diffusivity
Momentum diffusivity to mass diffusivity
Thermal diffusivity to momentum diffusivity

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