Heat and Mass Transfer
Heat flows from one body to other when they have

Different heat contents
Different atomic structure
Different temperatures
Different specific heat

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Heat and Mass Transfer
Which of the following would lead to a reduction in thermal resistance?

In convection, stirring of the fluid and cleaning the heating surface.
All of these
In conduction, reduction in the thickness of the material and an increase in thermal conductivity.
In radiation, increasing the temperature and reducing the emissivity.

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