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Herbert H Gottlieb says:But mine shafts are often hotter at the bottom than at the surface.
The outside air is warm, but the mine shaft air is cool, and hence
Please explain. Why should air blow DOWN a mine shaft during the
summer? In the summer the air is warm.
more dense.
Imagine replacing the cool air in the shaft with an even denser fluid.
What happens when you take a vertical tube full of water, and then
remove the endcaps?