this post was submitted on 11 May 2024
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That's just not true. Heat moves along the path of least resistance, not "up," "up" just happens to generally be less resistance than "down" due to density differences in air.
From your second link:
Density matters. Free electrons matter. But in short, metal and water conduct heat better than air, which means the heat transferred is more likely to go into the water than into the air. Certain metals conduct heat better than other metals, largely due to electrical conductivity.