Why is it that when you put a small hole on a bottle that is close, the water inside doesn’t come out but if you open the bottle cap, the water goes out?
In: Physics
If water comes out of the bottle, something needs to replace it, in this case air.
If the hole is to small to let air past, the water won’t come out because air can’t get in the bottle, so the vaccum pressure holds the water in.
When you open the cap, air can get in to replace the water through the opening on top, so the water flows out.
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