Why an empty cup which you turn upside down doesn’t fill up with water when dunking it straight down into the water
In: Physics
There is lots of air in that cup. Air is lighter than water, so it stays floating on top of the water. It can’t go up because of the base of the cup, it can’t go to the sides because of the walls of the cup, and it can’t go down because there’s heavier water in the way.
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