Heat Transfer Co-efficient in Natural Convection

Which of the following heat flow situations pertains to free or natural convection?
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The rate equation used to describe the mechanism of convection is called Newton's law of cooling. So rate of heat flow by convection doesn't depend on
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Under normal conditions, the heat transfer due to convection is _______ to the temperature difference between the parts.
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Which law comes into play in natural convection?
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According to Newton's law of cooling, the rate of convective heat transfer is ______ to heat transfer surface area, convective heat transfer coefficient and temperature difference.
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