Heat Transfer
Thermal diffusivity of a material

Is defined as K/ρ . Cp
Is the ratio of thermal conductivity to thermal capacity
Has the unit m² /sec
All of these

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Heat Transfer
Heat transfer by conduction results due to the transfer of free electrons, kinetic energy & vibrational energy from one molecule to another. Conduction heat transfer can not take place

Both B & C
Between two bodies not in physical contact with each other
From one part of a body to the another part of the same body
Between two bodies in physical contact with each other

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