A thin-walled glass beaker was placed in hot water. Then he was pulled out of the water and thrown upside down on the oilcloth

A thin-walled glass beaker was placed in hot water. Then he was pulled out of the water and thrown upside down on the oilcloth of the table, slightly pressing it. After a while, they found that the glass was difficult to remove from the oilcloth.
a) What thermodynamic process took place in a thermodynamic system – a glass of air?
b) Why is it difficult to remove the glass from the oilcloth?

a) isochoric cooling occurred in the thermodynamic system; b) the air pressure in the glass decreased as a result of isochoric cooling. therefore, atmospheric pressure presses the glass firmly against the table surface.

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